Cleanup unused methods and return values in FWL code.

This CL does an initial pass to remove unused methods and return values
in the FWL code base.

Review-Url: https://chromiumcodereview.appspot.com/2435603003

68 files changed, 373 insertions, 706 deletions

diff --git a/xfa/fwl/core/cfwl_event.h b/xfa/fwl/core/cfwl_event.h
index 3ef81ff3ba..2e1ed69145 100644
--- a/xfa/fwl/core/cfwl_event.h
+++ b/xfa/fwl/core/cfwl_event.h
@@ -69,7 +69,6 @@ class CFWL_Event {
   CFWL_Event();
   virtual ~CFWL_Event();
 
-  virtual FWL_Error GetClassName(CFX_WideString& wsClass) const;
   virtual CFWL_EventType GetClassID() const;
 
   uint32_t Release();
@@ -86,10 +85,6 @@ inline CFWL_Event::CFWL_Event()
 
 inline CFWL_Event::~CFWL_Event() {}
 
-inline FWL_Error CFWL_Event::GetClassName(CFX_WideString& wsClass) const {
-  return FWL_Error::Succeeded;
-}
-
 inline CFWL_EventType CFWL_Event::GetClassID() const {
   return CFWL_EventType::None;
 }
@@ -107,16 +102,11 @@ inline uint32_t CFWL_Event::Release() {
    public:                                                                  \
     classname();                                                            \
     ~classname() override;                                                  \
-    FWL_Error GetClassName(CFX_WideString& wsClass) const override;         \
     CFWL_EventType GetClassID() const override;                             \
     __VA_ARGS__                                                             \
   };                                                                        \
   inline classname::classname() {}                                          \
   inline classname::~classname() {}                                         \
-  inline FWL_Error classname::GetClassName(CFX_WideString& wsClass) const { \
-    wsClass = L## #classname;                                               \
-    return FWL_Error::Succeeded;                                            \
-  }                                                                         \
   inline CFWL_EventType classname::GetClassID() const { return eventType; }
 
 FWL_EVENT_DEF(CFWL_EvtMouse, CFWL_EventType::Mouse, FX_FLOAT m_fx;
diff --git a/xfa/fwl/core/cfwl_message.h b/xfa/fwl/core/cfwl_message.h
index 2bffff0007..0bfafb5a89 100644
--- a/xfa/fwl/core/cfwl_message.h
+++ b/xfa/fwl/core/cfwl_message.h
@@ -58,7 +58,6 @@ class CFWL_Message {
   virtual ~CFWL_Message();
 
   virtual CFWL_Message* Clone();
-  virtual FWL_Error GetClassName(CFX_WideString& wsClass) const;
   virtual CFWL_MessageType GetClassID() const;
 
   uint32_t Release();
@@ -84,10 +83,6 @@ inline CFWL_Message* CFWL_Message::Clone() {
   return nullptr;
 }
 
-inline FWL_Error CFWL_Message::GetClassName(CFX_WideString& wsClass) const {
-  return FWL_Error::Succeeded;
-}
-
 inline CFWL_MessageType CFWL_Message::GetClassID() const {
   return CFWL_MessageType::None;
 }
@@ -111,7 +106,6 @@ inline CFWL_Message* CFWL_Message::Retain() {
     classname();                                                    \
     ~classname() override;                                          \
     CFWL_Message* Clone() override;                                 \
-    FWL_Error GetClassName(CFX_WideString& wsClass) const override; \
     CFWL_MessageType GetClassID() const override;                   \
     __VA_ARGS__                                                     \
   };
@@ -120,10 +114,6 @@ inline CFWL_Message* CFWL_Message::Retain() {
   inline classname::classname() {}                                          \
   inline classname::~classname() {}                                         \
   inline CFWL_Message* classname::Clone() { return new classname(*this); }  \
-  inline FWL_Error classname::GetClassName(CFX_WideString& wsClass) const { \
-    wsClass = L## #classname;                                               \
-    return FWL_Error::Succeeded;                                            \
-  }                                                                         \
   inline CFWL_MessageType classname::GetClassID() const { return msgType; } \
   __VA_ARGS__
 
diff --git a/xfa/fwl/core/ifwl_barcode.cpp b/xfa/fwl/core/ifwl_barcode.cpp
index 770a857d78..a4b210f115 100644
--- a/xfa/fwl/core/ifwl_barcode.cpp
+++ b/xfa/fwl/core/ifwl_barcode.cpp
@@ -17,11 +17,6 @@ IFWL_Barcode::IFWL_Barcode(const CFWL_WidgetImpProperties& properties)
 
 IFWL_Barcode::~IFWL_Barcode() {}
 
-FWL_Error IFWL_Barcode::GetClassName(CFX_WideString& wsClass) const {
-  wsClass = FWL_CLASS_Barcode;
-  return FWL_Error::Succeeded;
-}
-
 FWL_Type IFWL_Barcode::GetClassID() const {
   return FWL_Type::Barcode;
 }
@@ -34,12 +29,14 @@ FWL_Error IFWL_Barcode::Initialize() {
     return FWL_Error::Indefinite;
   return FWL_Error::Succeeded;
 }
-FWL_Error IFWL_Barcode::Finalize() {
+
+void IFWL_Barcode::Finalize() {
   delete m_pDelegate;
   m_pDelegate = nullptr;
   m_pBarcodeEngine.reset();
-  return IFWL_Edit::Finalize();
+  IFWL_Edit::Finalize();
 }
+
 FWL_Error IFWL_Barcode::Update() {
   if (IsLocked()) {
     return FWL_Error::Indefinite;
@@ -48,6 +45,7 @@ FWL_Error IFWL_Barcode::Update() {
   GenerateBarcodeImageCache();
   return ret;
 }
+
 FWL_Error IFWL_Barcode::DrawWidget(CFX_Graphics* pGraphics,
                                    const CFX_Matrix* pMatrix) {
   if (!pGraphics)
diff --git a/xfa/fwl/core/ifwl_barcode.h b/xfa/fwl/core/ifwl_barcode.h
index cccc4f1b9c..2313f86d36 100644
--- a/xfa/fwl/core/ifwl_barcode.h
+++ b/xfa/fwl/core/ifwl_barcode.h
@@ -20,7 +20,6 @@ class IFWL_Widget;
 
 #define XFA_BCS_NeedUpdate 0x0001
 #define XFA_BCS_EncodeSuccess 0x0002
-#define FWL_CLASS_Barcode L"FWL_BARCODE"
 
 enum FWL_BCDAttribute {
   FWL_BCDATTRIBUTE_NONE = 0,
@@ -63,10 +62,9 @@ class IFWL_Barcode : public IFWL_Edit {
   ~IFWL_Barcode() override;
 
   // IFWL_Widget
-  FWL_Error GetClassName(CFX_WideString& wsClass) const override;
   FWL_Type GetClassID() const override;
   FWL_Error Initialize() override;
-  FWL_Error Finalize() override;
+  void Finalize() override;
   FWL_Error Update() override;
   FWL_Error DrawWidget(CFX_Graphics* pGraphics,
                        const CFX_Matrix* pMatrix = nullptr) override;
diff --git a/xfa/fwl/core/ifwl_caret.cpp b/xfa/fwl/core/ifwl_caret.cpp
index 643875a001..52269049e2 100644
--- a/xfa/fwl/core/ifwl_caret.cpp
+++ b/xfa/fwl/core/ifwl_caret.cpp
@@ -24,11 +24,6 @@ IFWL_Caret::IFWL_Caret(const CFWL_WidgetImpProperties& properties,
 
 IFWL_Caret::~IFWL_Caret() {}
 
-FWL_Error IFWL_Caret::GetClassName(CFX_WideString& wsClass) const {
-  wsClass = FWL_CLASS_Caret;
-  return FWL_Error::Succeeded;
-}
-
 FWL_Type IFWL_Caret::GetClassID() const {
   return FWL_Type::Caret;
 }
@@ -41,14 +36,14 @@ FWL_Error IFWL_Caret::Initialize() {
   return FWL_Error::Succeeded;
 }
 
-FWL_Error IFWL_Caret::Finalize() {
+void IFWL_Caret::Finalize() {
   if (m_pTimerInfo) {
     m_pTimerInfo->StopTimer();
     m_pTimerInfo = nullptr;
   }
   delete m_pDelegate;
   m_pDelegate = nullptr;
-  return IFWL_Widget::Finalize();
+  IFWL_Widget::Finalize();
 }
 
 FWL_Error IFWL_Caret::DrawWidget(CFX_Graphics* pGraphics,
diff --git a/xfa/fwl/core/ifwl_caret.h b/xfa/fwl/core/ifwl_caret.h
index 8cc3cf7e02..c5b6997b45 100644
--- a/xfa/fwl/core/ifwl_caret.h
+++ b/xfa/fwl/core/ifwl_caret.h
@@ -17,7 +17,6 @@ class CFWL_WidgetImpProperties;
 class IFWL_Widget;
 class CFWL_CaretImpDelegate;
 
-#define FWL_CLASS_Caret L"FWL_CARET"
 #define FWL_STATE_CAT_HightLight 1
 
 class IFWL_Caret : public IFWL_Widget {
@@ -26,10 +25,9 @@ class IFWL_Caret : public IFWL_Widget {
   ~IFWL_Caret() override;
 
   // IFWL_Widget
-  FWL_Error GetClassName(CFX_WideString& wsClass) const override;
   FWL_Type GetClassID() const override;
   FWL_Error Initialize() override;
-  FWL_Error Finalize() override;
+  void Finalize() override;
   FWL_Error DrawWidget(CFX_Graphics* pGraphics,
                        const CFX_Matrix* pMatrix = nullptr) override;
 
diff --git a/xfa/fwl/core/ifwl_checkbox.cpp b/xfa/fwl/core/ifwl_checkbox.cpp
index 20298c7308..cc06f9cea8 100644
--- a/xfa/fwl/core/ifwl_checkbox.cpp
+++ b/xfa/fwl/core/ifwl_checkbox.cpp
@@ -36,11 +36,6 @@ IFWL_CheckBox::IFWL_CheckBox(const CFWL_WidgetImpProperties& properties)
 
 IFWL_CheckBox::~IFWL_CheckBox() {}
 
-FWL_Error IFWL_CheckBox::GetClassName(CFX_WideString& wsClass) const {
-  wsClass = FWL_CLASS_CheckBox;
-  return FWL_Error::Succeeded;
-}
-
 FWL_Type IFWL_CheckBox::GetClassID() const {
   return FWL_Type::CheckBox;
 }
@@ -53,10 +48,10 @@ FWL_Error IFWL_CheckBox::Initialize() {
   return FWL_Error::Succeeded;
 }
 
-FWL_Error IFWL_CheckBox::Finalize() {
+void IFWL_CheckBox::Finalize() {
   delete m_pDelegate;
   m_pDelegate = nullptr;
-  return IFWL_Widget::Finalize();
+  IFWL_Widget::Finalize();
 }
 
 FWL_Error IFWL_CheckBox::GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize) {
diff --git a/xfa/fwl/core/ifwl_checkbox.h b/xfa/fwl/core/ifwl_checkbox.h
index 56a9139b99..cdf1e91ca3 100644
--- a/xfa/fwl/core/ifwl_checkbox.h
+++ b/xfa/fwl/core/ifwl_checkbox.h
@@ -12,7 +12,6 @@
 #include "xfa/fwl/core/ifwl_dataprovider.h"
 #include "xfa/fwl/core/ifwl_widget.h"
 
-#define FWL_CLASS_CheckBox L"FWL_CHECKBOX"
 #define FWL_STYLEEXT_CKB_Left (0L << 0)
 #define FWL_STYLEEXT_CKB_Center (1L << 0)
 #define FWL_STYLEEXT_CKB_Right (2L << 0)
@@ -62,10 +61,9 @@ class IFWL_CheckBox : public IFWL_Widget {
   ~IFWL_CheckBox() override;
 
   // IFWL_Widget
-  FWL_Error GetClassName(CFX_WideString& wsClass) const override;
   FWL_Type GetClassID() const override;
   FWL_Error Initialize() override;
-  FWL_Error Finalize() override;
+  void Finalize() override;
   FWL_Error GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize = FALSE) override;
   FWL_Error Update() override;
   FWL_Error DrawWidget(CFX_Graphics* pGraphics,
diff --git a/xfa/fwl/core/ifwl_combobox.cpp b/xfa/fwl/core/ifwl_combobox.cpp
index 9d3e58cec6..edc430a0f2 100644
--- a/xfa/fwl/core/ifwl_combobox.cpp
+++ b/xfa/fwl/core/ifwl_combobox.cpp
@@ -35,11 +35,6 @@ IFWL_ComboBox::IFWL_ComboBox(const CFWL_WidgetImpProperties& properties)
 
 IFWL_ComboBox::~IFWL_ComboBox() {}
 
-FWL_Error IFWL_ComboBox::GetClassName(CFX_WideString& wsClass) const {
-  wsClass = FWL_CLASS_ComboBox;
-  return FWL_Error::Succeeded;
-}
-
 FWL_Type IFWL_ComboBox::GetClassID() const {
   return FWL_Type::ComboBox;
 }
@@ -74,14 +69,14 @@ FWL_Error IFWL_ComboBox::Initialize() {
   return FWL_Error::Succeeded;
 }
 
-FWL_Error IFWL_ComboBox::Finalize() {
-  if (m_pEdit) {
+void IFWL_ComboBox::Finalize() {
+  if (m_pEdit)
     m_pEdit->Finalize();
-  }
+
   m_pListBox->Finalize();
   delete m_pDelegate;
   m_pDelegate = nullptr;
-  return IFWL_Widget::Finalize();
+  IFWL_Widget::Finalize();
 }
 
 FWL_Error IFWL_ComboBox::GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize) {
diff --git a/xfa/fwl/core/ifwl_combobox.h b/xfa/fwl/core/ifwl_combobox.h
index a40f6d583a..15db0490ee 100644
--- a/xfa/fwl/core/ifwl_combobox.h
+++ b/xfa/fwl/core/ifwl_combobox.h
@@ -25,7 +25,6 @@ class IFWL_FormProxy;
 class IFWL_ListBox;
 class IFWL_Widget;
 
-#define FWL_CLASS_ComboBox L"FWL_COMBOBOX"
 #define FWL_STYLEEXT_CMB_DropList (0L << 0)
 #define FWL_STYLEEXT_CMB_DropDown (1L << 0)
 #define FWL_STYLEEXT_CMB_Sort (1L << 1)
@@ -89,10 +88,9 @@ class IFWL_ComboBox : public IFWL_Widget {
   ~IFWL_ComboBox() override;
 
   // IFWL_Widget
-  FWL_Error GetClassName(CFX_WideString& wsClass) const override;
   FWL_Type GetClassID() const override;
   FWL_Error Initialize() override;
-  FWL_Error Finalize() override;
+  void Finalize() override;
   FWL_Error GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize = FALSE) override;
   FWL_Error ModifyStylesEx(uint32_t dwStylesExAdded,
                            uint32_t dwStylesExRemoved) override;
diff --git a/xfa/fwl/core/ifwl_combolist.cpp b/xfa/fwl/core/ifwl_combolist.cpp
index abe2c092d2..d34a55bcc2 100644
--- a/xfa/fwl/core/ifwl_combolist.cpp
+++ b/xfa/fwl/core/ifwl_combolist.cpp
@@ -23,10 +23,10 @@ FWL_Error IFWL_ComboList::Initialize() {
   return FWL_Error::Succeeded;
 }
 
-FWL_Error IFWL_ComboList::Finalize() {
+void IFWL_ComboList::Finalize() {
   delete m_pDelegate;
   m_pDelegate = nullptr;
-  return IFWL_ListBox::Finalize();
+  IFWL_ListBox::Finalize();
 }
 
 int32_t IFWL_ComboList::MatchItem(const CFX_WideString& wsMatch) {
diff --git a/xfa/fwl/core/ifwl_combolist.h b/xfa/fwl/core/ifwl_combolist.h
index 5d21b43681..d88a5956c2 100644
--- a/xfa/fwl/core/ifwl_combolist.h
+++ b/xfa/fwl/core/ifwl_combolist.h
@@ -18,7 +18,7 @@ class IFWL_ComboList : public IFWL_ListBox {
 
   // IFWL_Widget
   FWL_Error Initialize() override;
-  FWL_Error Finalize() override;
+  void Finalize() override;
 
   int32_t MatchItem(const CFX_WideString& wsMatch);
   void ChangeSelected(int32_t iSel);
diff --git a/xfa/fwl/core/ifwl_datetimecalendar.cpp b/xfa/fwl/core/ifwl_datetimecalendar.cpp
index 786d16860e..0e095b9424 100644
--- a/xfa/fwl/core/ifwl_datetimecalendar.cpp
+++ b/xfa/fwl/core/ifwl_datetimecalendar.cpp
@@ -23,10 +23,10 @@ FWL_Error IFWL_DateTimeCalendar::Initialize() {
   return FWL_Error::Succeeded;
 }
 
-FWL_Error IFWL_DateTimeCalendar::Finalize() {
+void IFWL_DateTimeCalendar::Finalize() {
   delete m_pDelegate;
   m_pDelegate = nullptr;
-  return IFWL_MonthCalendar::Finalize();
+  IFWL_MonthCalendar::Finalize();
 }
 
 CFWL_DateTimeCalendarImpDelegate::CFWL_DateTimeCalendarImpDelegate(
diff --git a/xfa/fwl/core/ifwl_datetimecalendar.h b/xfa/fwl/core/ifwl_datetimecalendar.h
index 864e756c96..c106e7f86d 100644
--- a/xfa/fwl/core/ifwl_datetimecalendar.h
+++ b/xfa/fwl/core/ifwl_datetimecalendar.h
@@ -16,7 +16,7 @@ class IFWL_DateTimeCalendar : public IFWL_MonthCalendar {
 
   // IFWL_MonthCalendar
   FWL_Error Initialize() override;
-  FWL_Error Finalize() override;
+  void Finalize() override;
 
  protected:
   friend class CFWL_DateTimeCalendarImpDelegate;
diff --git a/xfa/fwl/core/ifwl_datetimeedit.cpp b/xfa/fwl/core/ifwl_datetimeedit.cpp
index a16b729484..0097691c42 100644
--- a/xfa/fwl/core/ifwl_datetimeedit.cpp
+++ b/xfa/fwl/core/ifwl_datetimeedit.cpp
@@ -20,10 +20,10 @@ FWL_Error IFWL_DateTimeEdit::Initialize() {
   return FWL_Error::Succeeded;
 }
 
-FWL_Error IFWL_DateTimeEdit::Finalize() {
+void IFWL_DateTimeEdit::Finalize() {
   delete m_pDelegate;
   m_pDelegate = nullptr;
-  return IFWL_Edit::Finalize();
+  IFWL_Edit::Finalize();
 }
 
 CFWL_DateTimeEditImpDelegate::CFWL_DateTimeEditImpDelegate(
diff --git a/xfa/fwl/core/ifwl_datetimeedit.h b/xfa/fwl/core/ifwl_datetimeedit.h
index 29433e5173..2429e98a4c 100644
--- a/xfa/fwl/core/ifwl_datetimeedit.h
+++ b/xfa/fwl/core/ifwl_datetimeedit.h
@@ -20,7 +20,7 @@ class IFWL_DateTimeEdit : public IFWL_Edit {
 
   // IFWL_Edit
   FWL_Error Initialize() override;
-  FWL_Error Finalize() override;
+  void Finalize() override;
 
  protected:
   friend class CFWL_DateTimeEditImpDelegate;
diff --git a/xfa/fwl/core/ifwl_datetimepicker.cpp b/xfa/fwl/core/ifwl_datetimepicker.cpp
index 04290b62d1..ef13d71cf1 100644
--- a/xfa/fwl/core/ifwl_datetimepicker.cpp
+++ b/xfa/fwl/core/ifwl_datetimepicker.cpp
@@ -36,11 +36,6 @@ IFWL_DateTimePicker::IFWL_DateTimePicker(
 
 IFWL_DateTimePicker::~IFWL_DateTimePicker() {}
 
-FWL_Error IFWL_DateTimePicker::GetClassName(CFX_WideString& wsClass) const {
-  wsClass = FWL_CLASS_DateTimePicker;
-  return FWL_Error::Succeeded;
-}
-
 FWL_Type IFWL_DateTimePicker::GetClassID() const {
   return FWL_Type::DateTimePicker;
 }
@@ -75,20 +70,18 @@ FWL_Error IFWL_DateTimePicker::Initialize() {
   return FWL_Error::Succeeded;
 }
 
-FWL_Error IFWL_DateTimePicker::Finalize() {
-  if (m_pEdit) {
+void IFWL_DateTimePicker::Finalize() {
+  if (m_pEdit)
     m_pEdit->Finalize();
-  }
-  if (m_pMonthCal) {
+  if (m_pMonthCal)
     m_pMonthCal->Finalize();
-  }
-  if (m_pForm) {
+  if (m_pForm)
     m_pForm->Finalize();
-  }
+
   UnregisterEventTarget();
   delete m_pDelegate;
   m_pDelegate = nullptr;
-  return IFWL_Widget::Finalize();
+  IFWL_Widget::Finalize();
 }
 
 FWL_Error IFWL_DateTimePicker::GetWidgetRect(CFX_RectF& rect,
diff --git a/xfa/fwl/core/ifwl_datetimepicker.h b/xfa/fwl/core/ifwl_datetimepicker.h
index 28eefe1cde..4113e9b83e 100644
--- a/xfa/fwl/core/ifwl_datetimepicker.h
+++ b/xfa/fwl/core/ifwl_datetimepicker.h
@@ -13,7 +13,6 @@
 #include "xfa/fwl/core/ifwl_monthcalendar.h"
 #include "xfa/fwl/core/ifwl_widget.h"
 
-#define FWL_CLASS_DateTimePicker L"FWL_DATETIMEPICKER"
 #define FWL_STYLEEXT_DTP_AllowEdit (1L << 0)
 #define FWL_STYLEEXT_DTP_LongDateFormat (0L << 1)
 #define FWL_STYLEEXT_DTP_ShortDateFormat (1L << 1)
@@ -67,10 +66,9 @@ class IFWL_DateTimePicker : public IFWL_Widget {
   ~IFWL_DateTimePicker() override;
 
   // IFWL_Widget
-  FWL_Error GetClassName(CFX_WideString& wsClass) const override;
   FWL_Type GetClassID() const override;
   FWL_Error Initialize() override;
-  FWL_Error Finalize() override;
+  void Finalize() override;
   FWL_Error GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize = FALSE) override;
   FWL_Error Update() override;
   FWL_WidgetHit HitTest(FX_FLOAT fx, FX_FLOAT fy) override;
diff --git a/xfa/fwl/core/ifwl_edit.cpp b/xfa/fwl/core/ifwl_edit.cpp
index 189df97c89..1d769af6cb 100644
--- a/xfa/fwl/core/ifwl_edit.cpp
+++ b/xfa/fwl/core/ifwl_edit.cpp
@@ -79,11 +79,6 @@ IFWL_Edit::~IFWL_Edit() {
   ClearRecord();
 }
 
-FWL_Error IFWL_Edit::GetClassName(CFX_WideString& wsClass) const {
-  wsClass = FWL_CLASS_Edit;
-  return FWL_Error::Succeeded;
-}
-
 FWL_Type IFWL_Edit::GetClassID() const {
   return FWL_Type::Edit;
 }
@@ -101,20 +96,19 @@ FWL_Error IFWL_Edit::Initialize() {
   return FWL_Error::Succeeded;
 }
 
-FWL_Error IFWL_Edit::Finalize() {
-  if (m_pProperties->m_dwStates & FWL_WGTSTATE_Focused) {
+void IFWL_Edit::Finalize() {
+  if (m_pProperties->m_dwStates & FWL_WGTSTATE_Focused)
     ShowCaret(FALSE);
-  }
-  if (m_pHorzScrollBar) {
+  if (m_pHorzScrollBar)
     m_pHorzScrollBar->Finalize();
-  }
-  if (m_pVertScrollBar) {
+  if (m_pVertScrollBar)
     m_pVertScrollBar->Finalize();
-  }
+
   delete m_pDelegate;
   m_pDelegate = nullptr;
-  return IFWL_Widget::Finalize();
+  IFWL_Widget::Finalize();
 }
+
 FWL_Error IFWL_Edit::GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize) {
   if (bAutoSize) {
     rect.Set(0, 0, 0, 0);
@@ -796,19 +790,23 @@ FX_BOOL IFWL_Edit::On_Validate(CFDE_TxtEdtEngine* pEdit,
   DispatchEvent(&event);
   return event.bValidate;
 }
+
 FWL_Error IFWL_Edit::SetBackgroundColor(uint32_t color) {
   m_backColor = color;
   m_updateBackColor = TRUE;
   return FWL_Error::Succeeded;
 }
+
 FWL_Error IFWL_Edit::SetFont(const CFX_WideString& wsFont, FX_FLOAT fSize) {
   m_wsFont = wsFont;
   m_fFontSize = fSize;
   return FWL_Error::Succeeded;
 }
+
 void IFWL_Edit::SetScrollOffset(FX_FLOAT fScrollOffset) {
   m_fScrollOffsetY = fScrollOffset;
 }
+
 void IFWL_Edit::DrawTextBk(CFX_Graphics* pGraphics,
                            IFWL_ThemeProvider* pTheme,
                            const CFX_Matrix* pMatrix) {
diff --git a/xfa/fwl/core/ifwl_edit.h b/xfa/fwl/core/ifwl_edit.h
index 688c09c349..e327a2509f 100644
--- a/xfa/fwl/core/ifwl_edit.h
+++ b/xfa/fwl/core/ifwl_edit.h
@@ -19,7 +19,6 @@
 #include "xfa/fwl/lightwidget/cfwl_widget.h"
 #include "xfa/fxgraphics/cfx_path.h"
 
-#define FWL_CLASS_Edit L"FWL_EDIT"
 #define FWL_STYLEEXT_EDT_ReadOnly (1L << 0)
 #define FWL_STYLEEXT_EDT_MultiLine (1L << 1)
 #define FWL_STYLEEXT_EDT_WantReturn (1L << 2)
@@ -111,10 +110,9 @@ class IFWL_Edit : public IFWL_Widget {
   ~IFWL_Edit() override;
 
   // IFWL_Widget:
-  FWL_Error GetClassName(CFX_WideString& wsClass) const override;
   FWL_Type GetClassID() const override;
   FWL_Error Initialize() override;
-  FWL_Error Finalize() override;
+  void Finalize() override;
   FWL_Error GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize = FALSE) override;
   FWL_Error SetWidgetRect(const CFX_RectF& rect) override;
   FWL_Error Update() override;
diff --git a/xfa/fwl/core/ifwl_form.cpp b/xfa/fwl/core/ifwl_form.cpp
index ad78f98cb3..5aaa566ff4 100644
--- a/xfa/fwl/core/ifwl_form.cpp
+++ b/xfa/fwl/core/ifwl_form.cpp
@@ -52,7 +52,7 @@ IFWL_Form::IFWL_Form(const CFWL_WidgetImpProperties& properties,
       m_bLButtonDown(FALSE),
       m_bMaximized(false),
       m_bSetMaximize(FALSE),
-      m_bCustomizeLayout(FALSE),
+      m_bCustomizeLayout(false),
       m_eFormSize(FWL_FORMSIZE_Manual),
       m_bDoModalFlag(FALSE),
       m_pBigIcon(nullptr),
@@ -69,11 +69,6 @@ IFWL_Form::~IFWL_Form() {
   RemoveSysButtons();
 }
 
-FWL_Error IFWL_Form::GetClassName(CFX_WideString& wsClass) const {
-  wsClass = FWL_CLASS_Form;
-  return FWL_Error::Succeeded;
-}
-
 FWL_Type IFWL_Form::GetClassID() const {
   return FWL_Type::Form;
 }
@@ -92,13 +87,15 @@ FWL_Error IFWL_Form::Initialize() {
   m_pDelegate = new CFWL_FormImpDelegate(this);
   return FWL_Error::Succeeded;
 }
-FWL_Error IFWL_Form::Finalize() {
+
+void IFWL_Form::Finalize() {
   delete m_pDelegate;
   m_pDelegate = nullptr;
   UnregisterEventTarget();
   UnRegisterForm();
-  return IFWL_Widget::Finalize();
+  IFWL_Widget::Finalize();
 }
+
 FWL_Error IFWL_Form::GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize) {
   if (bAutoSize) {
     rect.Reset();
diff --git a/xfa/fwl/core/ifwl_form.h b/xfa/fwl/core/ifwl_form.h
index 3aa38a00cd..ee1f360629 100644
--- a/xfa/fwl/core/ifwl_form.h
+++ b/xfa/fwl/core/ifwl_form.h
@@ -89,11 +89,10 @@ class IFWL_Form : public IFWL_Widget {
   ~IFWL_Form() override;
 
   // IFWL_Widget
-  FWL_Error GetClassName(CFX_WideString& wsClass) const override;
   FWL_Type GetClassID() const override;
   FX_BOOL IsInstance(const CFX_WideStringC& wsClass) const override;
   FWL_Error Initialize() override;
-  FWL_Error Finalize() override;
+  void Finalize() override;
 
   FWL_Error GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize = FALSE) override;
   FWL_Error GetClientRect(CFX_RectF& rect) override;
@@ -176,7 +175,7 @@ class IFWL_Form : public IFWL_Widget {
   FX_BOOL m_bLButtonDown;
   bool m_bMaximized;
   FX_BOOL m_bSetMaximize;
-  FX_BOOL m_bCustomizeLayout;
+  bool m_bCustomizeLayout;
   FWL_FORMSIZE m_eFormSize;
   FX_BOOL m_bDoModalFlag;
   FX_FLOAT m_fSmallIconSz;
diff --git a/xfa/fwl/core/ifwl_formproxy.cpp b/xfa/fwl/core/ifwl_formproxy.cpp
index d97b5b6185..9a00bf3e8f 100644
--- a/xfa/fwl/core/ifwl_formproxy.cpp
+++ b/xfa/fwl/core/ifwl_formproxy.cpp
@@ -14,11 +14,6 @@ IFWL_FormProxy::IFWL_FormProxy(const CFWL_WidgetImpProperties& properties,
 
 IFWL_FormProxy::~IFWL_FormProxy() {}
 
-FWL_Error IFWL_FormProxy::GetClassName(CFX_WideString& wsClass) const {
-  wsClass = FWL_CLASS_FormProxy;
-  return FWL_Error::Succeeded;
-}
-
 FWL_Type IFWL_FormProxy::GetClassID() const {
   return FWL_Type::FormProxy;
 }
@@ -37,10 +32,10 @@ FWL_Error IFWL_FormProxy::Initialize() {
   return FWL_Error::Succeeded;
 }
 
-FWL_Error IFWL_FormProxy::Finalize() {
+void IFWL_FormProxy::Finalize() {
   delete m_pDelegate;
   m_pDelegate = nullptr;
-  return IFWL_Widget::Finalize();
+  IFWL_Widget::Finalize();
 }
 
 FWL_Error IFWL_FormProxy::Update() {
diff --git a/xfa/fwl/core/ifwl_formproxy.h b/xfa/fwl/core/ifwl_formproxy.h
index d5a1bd97de..3bc614c4d4 100644
--- a/xfa/fwl/core/ifwl_formproxy.h
+++ b/xfa/fwl/core/ifwl_formproxy.h
@@ -19,11 +19,10 @@ class IFWL_FormProxy : public IFWL_Form {
   ~IFWL_FormProxy() override;
 
   // IFWL_Widget
-  FWL_Error GetClassName(CFX_WideString& wsClass) const override;
   FWL_Type GetClassID() const override;
   FX_BOOL IsInstance(const CFX_WideStringC& wsClass) const override;
   FWL_Error Initialize() override;
-  FWL_Error Finalize() override;
+  void Finalize() override;
   FWL_Error Update() override;
   FWL_Error DrawWidget(CFX_Graphics* pGraphics,
                        const CFX_Matrix* pMatrix = nullptr) override;
diff --git a/xfa/fwl/core/ifwl_listbox.cpp b/xfa/fwl/core/ifwl_listbox.cpp
index ac2b1338b9..4e94d955d1 100644
--- a/xfa/fwl/core/ifwl_listbox.cpp
+++ b/xfa/fwl/core/ifwl_listbox.cpp
@@ -36,11 +36,6 @@ IFWL_ListBox::IFWL_ListBox(const CFWL_WidgetImpProperties& properties,
 
 IFWL_ListBox::~IFWL_ListBox() {}
 
-FWL_Error IFWL_ListBox::GetClassName(CFX_WideString& wsClass) const {
-  wsClass = FWL_CLASS_ListBox;
-  return FWL_Error::Succeeded;
-}
-
 FWL_Type IFWL_ListBox::GetClassID() const {
   return FWL_Type::ListBox;
 }
@@ -53,16 +48,15 @@ FWL_Error IFWL_ListBox::Initialize() {
   return FWL_Error::Succeeded;
 }
 
-FWL_Error IFWL_ListBox::Finalize() {
-  if (m_pVertScrollBar) {
+void IFWL_ListBox::Finalize() {
+  if (m_pVertScrollBar)
     m_pVertScrollBar->Finalize();
-  }
-  if (m_pHorzScrollBar) {
+  if (m_pHorzScrollBar)
     m_pHorzScrollBar->Finalize();
-  }
+
   delete m_pDelegate;
   m_pDelegate = nullptr;
-  return IFWL_Widget::Finalize();
+  IFWL_Widget::Finalize();
 }
 
 FWL_Error IFWL_ListBox::GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize) {
diff --git a/xfa/fwl/core/ifwl_listbox.h b/xfa/fwl/core/ifwl_listbox.h
index faab63056b..036aee2d62 100644
--- a/xfa/fwl/core/ifwl_listbox.h
+++ b/xfa/fwl/core/ifwl_listbox.h
@@ -16,7 +16,6 @@
 #include "xfa/fwl/core/ifwl_listbox.h"
 #include "xfa/fwl/core/ifwl_widget.h"
 
-#define FWL_CLASS_ListBox L"FWL_LISTBOX"
 #define FWL_STYLEEXT_LTB_MultiSelection (1L << 0)
 #define FWL_STYLEEXT_LTB_ShowScrollBarAlaways (1L << 2)
 #define FWL_STYLEEXT_LTB_MultiColumn (1L << 3)
@@ -107,10 +106,9 @@ class IFWL_ListBox : public IFWL_Widget {
   ~IFWL_ListBox() override;
 
   // IFWL_Widget
-  FWL_Error GetClassName(CFX_WideString& wsClass) const override;
   FWL_Type GetClassID() const override;
   FWL_Error Initialize() override;
-  FWL_Error Finalize() override;
+  void Finalize() override;
   FWL_Error GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize = FALSE) override;
   FWL_Error Update() override;
   FWL_WidgetHit HitTest(FX_FLOAT fx, FX_FLOAT fy) override;
diff --git a/xfa/fwl/core/ifwl_monthcalendar.cpp b/xfa/fwl/core/ifwl_monthcalendar.cpp
index 096e3586d0..69e7588245 100644
--- a/xfa/fwl/core/ifwl_monthcalendar.cpp
+++ b/xfa/fwl/core/ifwl_monthcalendar.cpp
@@ -151,11 +151,6 @@ IFWL_MonthCalendar::~IFWL_MonthCalendar() {
   m_arrSelDays.RemoveAll();
 }
 
-FWL_Error IFWL_MonthCalendar::GetClassName(CFX_WideString& wsClass) const {
-  wsClass = FWL_CLASS_MonthCalendar;
-  return FWL_Error::Succeeded;
-}
-
 FWL_Type IFWL_MonthCalendar::GetClassID() const {
   return FWL_Type::MonthCalendar;
 }
@@ -168,10 +163,10 @@ FWL_Error IFWL_MonthCalendar::Initialize() {
   return FWL_Error::Succeeded;
 }
 
-FWL_Error IFWL_MonthCalendar::Finalize() {
+void IFWL_MonthCalendar::Finalize() {
   delete m_pDelegate;
   m_pDelegate = nullptr;
-  return IFWL_Widget::Finalize();
+  IFWL_Widget::Finalize();
 }
 
 FWL_Error IFWL_MonthCalendar::GetWidgetRect(CFX_RectF& rect,
diff --git a/xfa/fwl/core/ifwl_monthcalendar.h b/xfa/fwl/core/ifwl_monthcalendar.h
index 48b15fef19..b9376b82c3 100644
--- a/xfa/fwl/core/ifwl_monthcalendar.h
+++ b/xfa/fwl/core/ifwl_monthcalendar.h
@@ -13,7 +13,6 @@
 #include "xfa/fwl/core/ifwl_dataprovider.h"
 #include "xfa/fwl/core/ifwl_widget.h"
 
-#define FWL_CLASS_MonthCalendar L"FWL_MONTHCALENDAR"
 #define FWL_STYLEEXT_MCD_MultiSelect (1L << 0)
 #define FWL_STYLEEXT_MCD_NoToday (1L << 1)
 #define FWL_STYLEEXT_MCD_NoTodayCircle (1L << 2)
@@ -58,10 +57,9 @@ class IFWL_MonthCalendar : public IFWL_Widget {
   ~IFWL_MonthCalendar() override;
 
   // FWL_WidgetImp
-  FWL_Error GetClassName(CFX_WideString& wsClass) const override;
   FWL_Type GetClassID() const override;
   FWL_Error Initialize() override;
-  FWL_Error Finalize() override;
+  void Finalize() override;
   FWL_Error GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize = FALSE) override;
   FWL_Error Update() override;
   FWL_Error DrawWidget(CFX_Graphics* pGraphics,
diff --git a/xfa/fwl/core/ifwl_picturebox.cpp b/xfa/fwl/core/ifwl_picturebox.cpp
index cff711ca99..301c404767 100644
--- a/xfa/fwl/core/ifwl_picturebox.cpp
+++ b/xfa/fwl/core/ifwl_picturebox.cpp
@@ -21,11 +21,6 @@ IFWL_PictureBox::IFWL_PictureBox(const CFWL_WidgetImpProperties& properties)
 
 IFWL_PictureBox::~IFWL_PictureBox() {}
 
-FWL_Error IFWL_PictureBox::GetClassName(CFX_WideString& wsClass) const {
-  wsClass = FWL_CLASS_PictureBox;
-  return FWL_Error::Succeeded;
-}
-
 FWL_Type IFWL_PictureBox::GetClassID() const {
   return FWL_Type::PictureBox;
 }
@@ -38,10 +33,10 @@ FWL_Error IFWL_PictureBox::Initialize() {
   return FWL_Error::Succeeded;
 }
 
-FWL_Error IFWL_PictureBox::Finalize() {
+void IFWL_PictureBox::Finalize() {
   delete m_pDelegate;
   m_pDelegate = nullptr;
-  return IFWL_Widget::Finalize();
+  IFWL_Widget::Finalize();
 }
 
 FWL_Error IFWL_PictureBox::GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize) {
diff --git a/xfa/fwl/core/ifwl_picturebox.h b/xfa/fwl/core/ifwl_picturebox.h
index 98edd2793f..cfc32c0ba5 100644
--- a/xfa/fwl/core/ifwl_picturebox.h
+++ b/xfa/fwl/core/ifwl_picturebox.h
@@ -12,7 +12,6 @@
 #include "xfa/fwl/core/ifwl_dataprovider.h"
 #include "xfa/fwl/core/ifwl_widget.h"
 
-#define FWL_CLASS_PictureBox L"FWL_PICTUREBOX"
 #define FWL_STYLEEXT_PTB_Left 0L << 0
 #define FWL_STYLEEXT_PTB_Center 1L << 0
 #define FWL_STYLEEXT_PTB_Right 2L << 0
@@ -49,10 +48,9 @@ class IFWL_PictureBox : public IFWL_Widget {
   ~IFWL_PictureBox() override;
 
   // IFWL_Widget
-  FWL_Error GetClassName(CFX_WideString& wsClass) const override;
   FWL_Type GetClassID() const override;
   FWL_Error Initialize() override;
-  FWL_Error Finalize() override;
+  void Finalize() override;
   FWL_Error GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize = FALSE) override;
   FWL_Error Update() override;
   FWL_Error DrawWidget(CFX_Graphics* pGraphics,
diff --git a/xfa/fwl/core/ifwl_pushbutton.cpp b/xfa/fwl/core/ifwl_pushbutton.cpp
index 7cbc2e116d..6040ae1117 100644
--- a/xfa/fwl/core/ifwl_pushbutton.cpp
+++ b/xfa/fwl/core/ifwl_pushbutton.cpp
@@ -25,11 +25,6 @@ IFWL_PushButton::IFWL_PushButton(const CFWL_WidgetImpProperties& properties)
 
 IFWL_PushButton::~IFWL_PushButton() {}
 
-FWL_Error IFWL_PushButton::GetClassName(CFX_WideString& wsClass) const {
-  wsClass = FWL_CLASS_PushButton;
-  return FWL_Error::Succeeded;
-}
-
 FWL_Type IFWL_PushButton::GetClassID() const {
   return FWL_Type::PushButton;
 }
@@ -42,10 +37,10 @@ FWL_Error IFWL_PushButton::Initialize() {
   return FWL_Error::Succeeded;
 }
 
-FWL_Error IFWL_PushButton::Finalize() {
+void IFWL_PushButton::Finalize() {
   delete m_pDelegate;
   m_pDelegate = nullptr;
-  return IFWL_Widget::Finalize();
+  IFWL_Widget::Finalize();
 }
 
 FWL_Error IFWL_PushButton::GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize) {
@@ -128,9 +123,9 @@ FWL_Error IFWL_PushButton::DrawWidget(CFX_Graphics* pGraphics,
   }
   CFX_RectF rtText;
   rtText.Set(0, 0, 0, 0);
-  if (!wsCaption.IsEmpty()) {
+  if (!wsCaption.IsEmpty())
     CalcTextRect(wsCaption, pTheme, 0, m_iTTOAlign, rtText);
-  }
+
   switch (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_PSB_ModeMask) {
     case FWL_STYLEEXT_PSB_TextOnly:
       DrawText(pGraphics, m_pProperties->m_pThemeProvider, &matrix);
diff --git a/xfa/fwl/core/ifwl_pushbutton.h b/xfa/fwl/core/ifwl_pushbutton.h
index d5ada29e41..8906aa898f 100644
--- a/xfa/fwl/core/ifwl_pushbutton.h
+++ b/xfa/fwl/core/ifwl_pushbutton.h
@@ -11,7 +11,6 @@
 #include "xfa/fwl/core/ifwl_dataprovider.h"
 #include "xfa/fwl/core/ifwl_widget.h"
 
-#define FWL_CLASS_PushButton L"FWL_PUSHBUTTON"
 #define FWL_STYLEEXT_PSB_Left (0L << 0)
 #define FWL_STYLEEXT_PSB_Center (1L << 0)
 #define FWL_STYLEEXT_PSB_Right (2L << 0)
@@ -45,10 +44,9 @@ class IFWL_PushButton : public IFWL_Widget {
   ~IFWL_PushButton() override;
 
   // IFWL_Widget
-  FWL_Error GetClassName(CFX_WideString& wsClass) const override;
   FWL_Type GetClassID() const override;
   FWL_Error Initialize() override;
-  FWL_Error Finalize() override;
+  void Finalize() override;
   FWL_Error GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize = FALSE) override;
   void SetStates(uint32_t dwStates, FX_BOOL bSet = TRUE) override;
   FWL_Error Update() override;
diff --git a/xfa/fwl/core/ifwl_scrollbar.cpp b/xfa/fwl/core/ifwl_scrollbar.cpp
index 8c677f6a0b..e3b9ca64d9 100644
--- a/xfa/fwl/core/ifwl_scrollbar.cpp
+++ b/xfa/fwl/core/ifwl_scrollbar.cpp
@@ -41,7 +41,7 @@ IFWL_ScrollBar::IFWL_ScrollBar(const CFWL_WidgetImpProperties& properties,
       m_bRepaintThumb(FALSE),
       m_fButtonLen(0),
       m_bMinSize(FALSE),
-      m_bCustomLayout(FALSE),
+      m_bCustomLayout(false),
       m_fMinThumb(FWL_SCROLLBAR_MinThumb) {
   m_rtClient.Reset();
   m_rtThumb.Reset();
@@ -53,11 +53,6 @@ IFWL_ScrollBar::IFWL_ScrollBar(const CFWL_WidgetImpProperties& properties,
 
 IFWL_ScrollBar::~IFWL_ScrollBar() {}
 
-FWL_Error IFWL_ScrollBar::GetClassName(CFX_WideString& wsClass) const {
-  wsClass = FWL_CLASS_ScrollBar;
-  return FWL_Error::Succeeded;
-}
-
 FWL_Type IFWL_ScrollBar::GetClassID() const {
   return FWL_Type::ScrollBar;
 }
@@ -70,10 +65,10 @@ FWL_Error IFWL_ScrollBar::Initialize() {
   return FWL_Error::Succeeded;
 }
 
-FWL_Error IFWL_ScrollBar::Finalize() {
+void IFWL_ScrollBar::Finalize() {
   delete m_pDelegate;
   m_pDelegate = nullptr;
-  return IFWL_Widget::Finalize();
+  IFWL_Widget::Finalize();
 }
 
 FWL_Error IFWL_ScrollBar::GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize) {
diff --git a/xfa/fwl/core/ifwl_scrollbar.h b/xfa/fwl/core/ifwl_scrollbar.h
index 39d3c04eb2..95fe7739fe 100644
--- a/xfa/fwl/core/ifwl_scrollbar.h
+++ b/xfa/fwl/core/ifwl_scrollbar.h
@@ -18,7 +18,6 @@ class CFWL_ScrollBarImpDelegate;
 class CFWL_WidgetImpProperties;
 class IFWL_Widget;
 
-#define FWL_CLASS_ScrollBar L"FWL_SCROLLBAR"
 #define FWL_STYLEEXT_SCB_Horz (0L << 0)
 #define FWL_STYLEEXT_SCB_Vert (1L << 0)
 
@@ -44,10 +43,9 @@ class IFWL_ScrollBar : public IFWL_Widget, public IFWL_Timer {
   ~IFWL_ScrollBar() override;
 
   // IFWL_Widget
-  FWL_Error GetClassName(CFX_WideString& wsClass) const override;
   FWL_Type GetClassID() const override;
   FWL_Error Initialize() override;
-  FWL_Error Finalize() override;
+  void Finalize() override;
   FWL_Error GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize = FALSE) override;
   FWL_Error Update() override;
   FWL_Error DrawWidget(CFX_Graphics* pGraphics,
@@ -124,7 +122,7 @@ class IFWL_ScrollBar : public IFWL_Widget, public IFWL_Timer {
   CFX_RectF m_rtMaxBtn;
   CFX_RectF m_rtMinTrack;
   CFX_RectF m_rtMaxTrack;
-  FX_BOOL m_bCustomLayout;
+  bool m_bCustomLayout;
   FX_FLOAT m_fMinThumb;
 
  protected:
diff --git a/xfa/fwl/core/ifwl_spinbutton.cpp b/xfa/fwl/core/ifwl_spinbutton.cpp
index a4212bcaeb..d94a240e59 100644
--- a/xfa/fwl/core/ifwl_spinbutton.cpp
+++ b/xfa/fwl/core/ifwl_spinbutton.cpp
@@ -38,11 +38,6 @@ IFWL_SpinButton::IFWL_SpinButton(const CFWL_WidgetImpProperties& properties)
 
 IFWL_SpinButton::~IFWL_SpinButton() {}
 
-FWL_Error IFWL_SpinButton::GetClassName(CFX_WideString& wsClass) const {
-  wsClass = FWL_CLASS_SpinButton;
-  return FWL_Error::Succeeded;
-}
-
 FWL_Type IFWL_SpinButton::GetClassID() const {
   return FWL_Type::SpinButton;
 }
@@ -55,10 +50,10 @@ FWL_Error IFWL_SpinButton::Initialize() {
   return FWL_Error::Succeeded;
 }
 
-FWL_Error IFWL_SpinButton::Finalize() {
+void IFWL_SpinButton::Finalize() {
   delete m_pDelegate;
   m_pDelegate = nullptr;
-  return IFWL_Widget::Finalize();
+  IFWL_Widget::Finalize();
 }
 
 FWL_Error IFWL_SpinButton::GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize) {
diff --git a/xfa/fwl/core/ifwl_spinbutton.h b/xfa/fwl/core/ifwl_spinbutton.h
index f35732c4ca..e5e6211917 100644
--- a/xfa/fwl/core/ifwl_spinbutton.h
+++ b/xfa/fwl/core/ifwl_spinbutton.h
@@ -12,7 +12,6 @@
 #include "xfa/fwl/core/ifwl_widget.h"
 #include "xfa/fxfa/cxfa_eventparam.h"
 
-#define FWL_CLASS_SpinButton L"FWL_SPINBUTTON"
 #define FWL_STYLEEXE_SPB_Vert (1L << 0)
 
 class CFWL_MsgMouse;
@@ -27,10 +26,9 @@ class IFWL_SpinButton : public IFWL_Widget, public IFWL_Timer {
   ~IFWL_SpinButton() override;
 
   // IFWL_Widget
-  FWL_Error GetClassName(CFX_WideString& wsClass) const override;
   FWL_Type GetClassID() const override;
   FWL_Error Initialize() override;
-  FWL_Error Finalize() override;
+  void Finalize() override;
   FWL_Error GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize = FALSE) override;
   FWL_Error Update() override;
   FWL_WidgetHit HitTest(FX_FLOAT fx, FX_FLOAT fy) override;
diff --git a/xfa/fwl/core/ifwl_themeprovider.h b/xfa/fwl/core/ifwl_themeprovider.h
index 275f649574..d64b6f038d 100644
--- a/xfa/fwl/core/ifwl_themeprovider.h
+++ b/xfa/fwl/core/ifwl_themeprovider.h
@@ -20,12 +20,12 @@ class IFWL_Widget;
 class IFWL_ThemeProvider {
  public:
   virtual ~IFWL_ThemeProvider() {}
-  virtual FX_BOOL DrawBackground(CFWL_ThemeBackground* pParams) = 0;
-  virtual FX_BOOL DrawText(CFWL_ThemeText* pParams) = 0;
+  virtual void DrawBackground(CFWL_ThemeBackground* pParams) = 0;
+  virtual void DrawText(CFWL_ThemeText* pParams) = 0;
   virtual void* GetCapacity(CFWL_ThemePart* pThemePart,
                             CFWL_WidgetCapacity dwCapacity) = 0;
-  virtual FX_BOOL IsCustomizedLayout(IFWL_Widget* pWidget) = 0;
-  virtual FX_BOOL CalcTextRect(CFWL_ThemeText* pParams, CFX_RectF& rect) = 0;
+  virtual bool IsCustomizedLayout(IFWL_Widget* pWidget) = 0;
+  virtual void CalcTextRect(CFWL_ThemeText* pParams, CFX_RectF& rect) = 0;
 };
 
 #endif  // XFA_FWL_CORE_IFWL_THEMEPROVIDER_H_
diff --git a/xfa/fwl/core/ifwl_tooltip.cpp b/xfa/fwl/core/ifwl_tooltip.cpp
index 6281040546..a9b9085010 100644
--- a/xfa/fwl/core/ifwl_tooltip.cpp
+++ b/xfa/fwl/core/ifwl_tooltip.cpp
@@ -32,11 +32,6 @@ IFWL_ToolTip::IFWL_ToolTip(const CFWL_WidgetImpProperties& properties,
 
 IFWL_ToolTip::~IFWL_ToolTip() {}
 
-FWL_Error IFWL_ToolTip::GetClassName(CFX_WideString& wsClass) const {
-  wsClass = FWL_CLASS_ToolTip;
-  return FWL_Error::Succeeded;
-}
-
 FWL_Type IFWL_ToolTip::GetClassID() const {
   return FWL_Type::ToolTip;
 }
@@ -51,10 +46,10 @@ FWL_Error IFWL_ToolTip::Initialize() {
   return FWL_Error::Succeeded;
 }
 
-FWL_Error IFWL_ToolTip::Finalize() {
+void IFWL_ToolTip::Finalize() {
   delete m_pDelegate;
   m_pDelegate = nullptr;
-  return IFWL_Widget::Finalize();
+  IFWL_Widget::Finalize();
 }
 
 FWL_Error IFWL_ToolTip::GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize) {
diff --git a/xfa/fwl/core/ifwl_tooltip.h b/xfa/fwl/core/ifwl_tooltip.h
index 7554f82bf9..4aed7d8f7f 100644
--- a/xfa/fwl/core/ifwl_tooltip.h
+++ b/xfa/fwl/core/ifwl_tooltip.h
@@ -14,7 +14,6 @@ class CFWL_WidgetImpProperties;
 class IFWL_Widget;
 class CFWL_ToolTipImpDelegate;
 
-#define FWL_CLASS_ToolTip L"FWL_TOOLTIP"
 #define FWL_STYLEEXT_TTP_Rectangle (0L << 3)
 #define FWL_STYLEEXT_TTP_RoundCorner (1L << 3)
 #define FWL_STYLEEXT_TTP_Balloon (1L << 4)
@@ -39,10 +38,9 @@ class IFWL_ToolTip : public IFWL_Form {
   ~IFWL_ToolTip() override;
 
   // IFWL_Widget
-  FWL_Error GetClassName(CFX_WideString& wsClass) const override;
   FWL_Type GetClassID() const override;
   FWL_Error Initialize() override;
-  FWL_Error Finalize() override;
+  void Finalize() override;
   FWL_Error GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize = FALSE) override;
   FWL_Error Update() override;
   FWL_Error DrawWidget(CFX_Graphics* pGraphics,
diff --git a/xfa/fwl/core/ifwl_widget.cpp b/xfa/fwl/core/ifwl_widget.cpp
index 68755bf24a..5ec738f8cc 100644
--- a/xfa/fwl/core/ifwl_widget.cpp
+++ b/xfa/fwl/core/ifwl_widget.cpp
@@ -24,6 +24,22 @@
 
 #define FWL_STYLEEXT_MNU_Vert (1L << 0)
 
+IFWL_Widget::IFWL_Widget(const CFWL_WidgetImpProperties& properties,
+                         IFWL_Widget* pOuter)
+    : m_pWidgetMgr(CFWL_WidgetMgr::GetInstance()),
+      m_pProperties(new CFWL_WidgetImpProperties(properties)),
+      m_pDelegate(nullptr),
+      m_pCurDelegate(nullptr),
+      m_pOuter(pOuter),
+      m_pLayoutItem(nullptr),
+      m_pAssociate(nullptr),
+      m_iLock(0),
+      m_nEventKey(0) {
+  ASSERT(m_pWidgetMgr);
+}
+
+IFWL_Widget::~IFWL_Widget() {}
+
 FWL_Error IFWL_Widget::Initialize() {
   IFWL_App* pApp = FWL_GetApp();
   if (!pApp)
@@ -45,15 +61,9 @@ FWL_Error IFWL_Widget::Initialize() {
   return FWL_Error::Succeeded;
 }
 
-FWL_Error IFWL_Widget::Finalize() {
+void IFWL_Widget::Finalize() {
   NotifyDriver();
   m_pWidgetMgr->RemoveWidget(this);
-  return FWL_Error::Succeeded;
-}
-
-FWL_Error IFWL_Widget::GetClassName(CFX_WideString& wsClass) const {
-  wsClass.clear();
-  return FWL_Error::Succeeded;
 }
 
 FX_BOOL IFWL_Widget::IsInstance(const CFX_WideStringC& wsClass) const {
@@ -389,30 +399,9 @@ void IFWL_Widget::SetLayoutItem(void* pItem) {
   m_pLayoutItem = pItem;
 }
 
-CFWL_Widget* IFWL_Widget::GetAssociateWidget() const {
-  return m_pAssociate;
-}
-
 void IFWL_Widget::SetAssociateWidget(CFWL_Widget* pAssociate) {
   m_pAssociate = pAssociate;
 }
-
-IFWL_Widget::IFWL_Widget(const CFWL_WidgetImpProperties& properties,
-                         IFWL_Widget* pOuter)
-    : m_pWidgetMgr(CFWL_WidgetMgr::GetInstance()),
-      m_pProperties(new CFWL_WidgetImpProperties(properties)),
-      m_pDelegate(nullptr),
-      m_pCurDelegate(nullptr),
-      m_pOuter(pOuter),
-      m_pLayoutItem(nullptr),
-      m_pAssociate(nullptr),
-      m_iLock(0),
-      m_nEventKey(0) {
-  ASSERT(m_pWidgetMgr);
-}
-
-IFWL_Widget::~IFWL_Widget() {}
-
 FX_BOOL IFWL_Widget::IsEnabled() const {
   return (m_pProperties->m_dwStates & FWL_WGTSTATE_Disabled) == 0;
 }
diff --git a/xfa/fwl/core/ifwl_widget.h b/xfa/fwl/core/ifwl_widget.h
index 9db7a0505a..6cb241d363 100644
--- a/xfa/fwl/core/ifwl_widget.h
+++ b/xfa/fwl/core/ifwl_widget.h
@@ -67,8 +67,7 @@ class IFWL_Widget {
   virtual ~IFWL_Widget();
 
   virtual FWL_Error Initialize();
-  virtual FWL_Error Finalize();
-  virtual FWL_Error GetClassName(CFX_WideString& wsClass) const;
+  virtual void Finalize();
   virtual FWL_Type GetClassID() const = 0;
   virtual FX_BOOL IsInstance(const CFX_WideStringC& wsClass) const;
 
@@ -76,31 +75,42 @@ class IFWL_Widget {
   virtual FWL_Error GetGlobalRect(CFX_RectF& rect);
   virtual FWL_Error SetWidgetRect(const CFX_RectF& rect);
   virtual FWL_Error GetClientRect(CFX_RectF& rect);
+
   virtual IFWL_Widget* GetParent();
   virtual FWL_Error SetParent(IFWL_Widget* pParent);
+
   virtual IFWL_Widget* GetOwner();
   virtual FWL_Error SetOwner(IFWL_Widget* pOwner);
+
   virtual IFWL_Widget* GetOuter();
+
   virtual uint32_t GetStyles();
   virtual FWL_Error ModifyStyles(uint32_t dwStylesAdded,
                                  uint32_t dwStylesRemoved);
   virtual uint32_t GetStylesEx();
   virtual FWL_Error ModifyStylesEx(uint32_t dwStylesExAdded,
                                    uint32_t dwStylesExRemoved);
+
   virtual uint32_t GetStates();
   virtual void SetStates(uint32_t dwStates, FX_BOOL bSet = TRUE);
+
   virtual FWL_Error Update();
   virtual FWL_Error LockUpdate();
   virtual FWL_Error UnlockUpdate();
+
   virtual FWL_WidgetHit HitTest(FX_FLOAT fx, FX_FLOAT fy);
+
   virtual FWL_Error TransformTo(IFWL_Widget* pWidget,
                                 FX_FLOAT& fx,
                                 FX_FLOAT& fy);
   virtual FWL_Error TransformTo(IFWL_Widget* pWidget, CFX_RectF& rt);
+
   virtual FWL_Error GetMatrix(CFX_Matrix& matrix, FX_BOOL bGlobal = FALSE);
   virtual FWL_Error SetMatrix(const CFX_Matrix& matrix);
+
   virtual FWL_Error DrawWidget(CFX_Graphics* pGraphics,
                                const CFX_Matrix* pMatrix = nullptr);
+
   virtual IFWL_ThemeProvider* GetThemeProvider();
   virtual FWL_Error SetThemeProvider(IFWL_ThemeProvider* pThemeProvider);
   virtual IFWL_WidgetDelegate* SetDelegate(IFWL_WidgetDelegate* pDelegate);
@@ -115,7 +125,6 @@ class IFWL_Widget {
   void* GetLayoutItem() const;
   void SetLayoutItem(void* pItem);
 
-  CFWL_Widget* GetAssociateWidget() const;
   void SetAssociateWidget(CFWL_Widget* pAssociate);
 
  protected:
diff --git a/xfa/fwl/lightwidget/cfwl_widget.cpp b/xfa/fwl/lightwidget/cfwl_widget.cpp
index fe2b35c46b..c77bfc215c 100644
--- a/xfa/fwl/lightwidget/cfwl_widget.cpp
+++ b/xfa/fwl/lightwidget/cfwl_widget.cpp
@@ -18,30 +18,24 @@
 #define FWL_WGT_CalcWidth 2048
 #define FWL_WGT_CalcMultiLineDefWidth 120.0f
 
-IFWL_Widget* CFWL_Widget::GetWidget() {
-  return m_pIface.get();
-}
-
-const IFWL_Widget* CFWL_Widget::GetWidget() const {
-  return m_pIface.get();
+CFWL_Widget::CFWL_Widget()
+    : m_pDelegate(nullptr),
+      m_pWidgetMgr(CFWL_WidgetMgr::GetInstance()),
+      m_pProperties(new CFWL_WidgetProperties) {
+  ASSERT(m_pWidgetMgr);
 }
 
-FWL_Error CFWL_Widget::GetClassName(CFX_WideString& wsClass) const {
-  if (!m_pIface)
-    return FWL_Error::Indefinite;
-  return m_pIface->GetClassName(wsClass);
+CFWL_Widget::~CFWL_Widget() {
+  if (m_pIface)
+    m_pIface->Finalize();
 }
 
-FWL_Type CFWL_Widget::GetClassID() const {
-  if (!m_pIface)
-    return FWL_Type::Unknown;
-  return m_pIface->GetClassID();
+IFWL_Widget* CFWL_Widget::GetWidget() {
+  return m_pIface.get();
 }
 
-FX_BOOL CFWL_Widget::IsInstance(const CFX_WideStringC& wsClass) const {
-  if (!m_pIface)
-    return FALSE;
-  return m_pIface->IsInstance(wsClass);
+const IFWL_Widget* CFWL_Widget::GetWidget() const {
+  return m_pIface.get();
 }
 
 FWL_Error CFWL_Widget::Initialize(const CFWL_WidgetProperties* pProperties) {
@@ -75,39 +69,6 @@ FWL_Error CFWL_Widget::GetClientRect(CFX_RectF& rect) {
   return m_pIface->GetClientRect(rect);
 }
 
-CFWL_Widget* CFWL_Widget::GetParent() {
-  if (!m_pIface)
-    return nullptr;
-
-  IFWL_Widget* parent = m_pIface->GetParent();
-  if (!parent)
-    return nullptr;
-
-  return static_cast<CFWL_Widget*>(parent->GetAssociateWidget());
-}
-
-FWL_Error CFWL_Widget::SetParent(CFWL_Widget* pParent) {
-  if (!m_pIface)
-    return FWL_Error::Indefinite;
-  return m_pIface->SetParent(pParent ? pParent->GetWidget() : nullptr);
-}
-
-CFWL_Widget* CFWL_Widget::GetOwner() {
-  return nullptr;
-}
-
-FWL_Error CFWL_Widget::SetOwner(CFWL_Widget* pOwner) {
-  if (!m_pIface)
-    return FWL_Error::Indefinite;
-  return FWL_Error::Succeeded;
-}
-
-uint32_t CFWL_Widget::GetStyles() {
-  if (!m_pIface)
-    return 0;
-  return m_pIface->GetStyles();
-}
-
 FWL_Error CFWL_Widget::ModifyStyles(uint32_t dwStylesAdded,
                                     uint32_t dwStylesRemoved) {
   if (!m_pIface)
@@ -135,31 +96,27 @@ void CFWL_Widget::SetStates(uint32_t dwStates, FX_BOOL bSet) {
     m_pIface->SetStates(dwStates, bSet);
 }
 
-void* CFWL_Widget::GetLayoutItem() const {
-  return m_pIface ? m_pIface->GetLayoutItem() : nullptr;
-}
-
 void CFWL_Widget::SetLayoutItem(void* pItem) {
   if (m_pIface)
     m_pIface->SetLayoutItem(pItem);
 }
 
-FWL_Error CFWL_Widget::Update() {
+void CFWL_Widget::Update() {
   if (!m_pIface)
-    return FWL_Error::Indefinite;
-  return m_pIface->Update();
+    return;
+  m_pIface->Update();
 }
 
-FWL_Error CFWL_Widget::LockUpdate() {
+void CFWL_Widget::LockUpdate() {
   if (!m_pIface)
-    return FWL_Error::Indefinite;
-  return m_pIface->LockUpdate();
+    return;
+  m_pIface->LockUpdate();
 }
 
-FWL_Error CFWL_Widget::UnlockUpdate() {
+void CFWL_Widget::UnlockUpdate() {
   if (!m_pIface)
-    return FWL_Error::Indefinite;
-  return m_pIface->UnlockUpdate();
+    return;
+  m_pIface->UnlockUpdate();
 }
 
 FWL_WidgetHit CFWL_Widget::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
@@ -168,33 +125,6 @@ FWL_WidgetHit CFWL_Widget::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
   return m_pIface->HitTest(fx, fy);
 }
 
-FWL_Error CFWL_Widget::TransformTo(CFWL_Widget* pWidget,
-                                   FX_FLOAT& fx,
-                                   FX_FLOAT& fy) {
-  if (!m_pIface)
-    return FWL_Error::Indefinite;
-  return m_pIface->TransformTo(pWidget ? pWidget->GetWidget() : nullptr, fx,
-                               fy);
-}
-
-FWL_Error CFWL_Widget::TransformTo(CFWL_Widget* pWidget, CFX_RectF& rt) {
-  if (!m_pIface)
-    return FWL_Error::Indefinite;
-  return m_pIface->TransformTo(pWidget ? pWidget->GetWidget() : nullptr, rt);
-}
-
-FWL_Error CFWL_Widget::GetMatrix(CFX_Matrix& matrix, FX_BOOL bGlobal) {
-  if (!m_pIface)
-    return FWL_Error::Indefinite;
-  return m_pIface->GetMatrix(matrix, bGlobal);
-}
-
-FWL_Error CFWL_Widget::SetMatrix(const CFX_Matrix& matrix) {
-  if (!m_pIface)
-    return FWL_Error::Indefinite;
-  return m_pIface->SetMatrix(matrix);
-}
-
 FWL_Error CFWL_Widget::DrawWidget(CFX_Graphics* pGraphics,
                                   const CFX_Matrix* pMatrix) {
   if (!m_pIface)
@@ -209,128 +139,3 @@ IFWL_WidgetDelegate* CFWL_Widget::SetDelegate(IFWL_WidgetDelegate* pDelegate) {
   m_pDelegate = m_pIface->SetDelegate(pDelegate);
   return m_pDelegate;
 }
-
-CFWL_Widget::CFWL_Widget()
-    : m_pDelegate(nullptr),
-      m_pWidgetMgr(CFWL_WidgetMgr::GetInstance()),
-      m_pProperties(new CFWL_WidgetProperties) {
-  ASSERT(m_pWidgetMgr);
-}
-
-CFWL_Widget::~CFWL_Widget() {
-  if (m_pIface)
-    m_pIface->Finalize();
-}
-
-FWL_Error CFWL_Widget::Repaint(const CFX_RectF* pRect) {
-  if (!m_pIface)
-    return FWL_Error::Indefinite;
-
-  CFX_RectF rect;
-  if (pRect) {
-    rect = *pRect;
-  } else {
-    m_pIface->GetWidgetRect(rect);
-    rect.left = rect.top = 0;
-  }
-  return m_pWidgetMgr->RepaintWidget(m_pIface.get(), &rect);
-}
-
-FWL_Error CFWL_Widget::SetFocus(FX_BOOL bFocus) {
-  if (!m_pIface)
-    return FWL_Error::Indefinite;
-
-  IFWL_App* pApp = m_pIface->GetOwnerApp();
-  if (!pApp)
-    return FWL_Error::Indefinite;
-
-  CFWL_NoteDriver* pDriver = pApp->GetNoteDriver();
-  if (!pDriver)
-    return FWL_Error::Indefinite;
-
-  if (bFocus) {
-    pDriver->SetFocus(m_pIface.get());
-  } else {
-    if (pDriver->GetFocus() == m_pIface.get()) {
-      pDriver->SetFocus(nullptr);
-    }
-  }
-  return FWL_Error::Succeeded;
-}
-
-FWL_Error CFWL_Widget::SetGrab(FX_BOOL bSet) {
-  if (!m_pIface)
-    return FWL_Error::Indefinite;
-
-  IFWL_App* pApp = m_pIface->GetOwnerApp();
-  if (!pApp)
-    return FWL_Error::Indefinite;
-
-  CFWL_NoteDriver* pDriver = pApp->GetNoteDriver();
-  if (!pDriver)
-    return FWL_Error::Indefinite;
-
-  pDriver->SetGrab(m_pIface.get(), bSet);
-  return FWL_Error::Succeeded;
-}
-
-void CFWL_Widget::RegisterEventTarget(CFWL_Widget* pEventSource,
-                                      uint32_t dwFilter) {
-  if (!m_pIface)
-    return;
-
-  IFWL_App* pApp = m_pIface->GetOwnerApp();
-  if (!pApp)
-    return;
-
-  CFWL_NoteDriver* pNoteDriver = pApp->GetNoteDriver();
-  if (!pNoteDriver)
-    return;
-
-  IFWL_Widget* pEventSourceImp =
-      !pEventSource ? nullptr : pEventSource->GetWidget();
-  pNoteDriver->RegisterEventTarget(GetWidget(), pEventSourceImp, dwFilter);
-}
-
-void CFWL_Widget::DispatchEvent(CFWL_Event* pEvent) {
-  if (!m_pIface)
-    return;
-  if (m_pIface->GetOuter())
-    return;
-
-  IFWL_App* pApp = m_pIface->GetOwnerApp();
-  if (!pApp)
-    return;
-
-  CFWL_NoteDriver* pNoteDriver = pApp->GetNoteDriver();
-  if (!pNoteDriver)
-    return;
-
-  pNoteDriver->SendEvent(pEvent);
-}
-
-CFX_SizeF CFWL_Widget::CalcTextSize(const CFX_WideString& wsText,
-                                    FX_BOOL bMultiLine,
-                                    int32_t iLineWidth) {
-  if (!m_pIface)
-    return CFX_SizeF();
-
-  IFWL_ThemeProvider* pTheme = m_pIface->GetThemeProvider();
-  if (!pTheme)
-    return CFX_SizeF();
-
-  CFWL_ThemeText calPart;
-  calPart.m_pWidget = m_pIface.get();
-  calPart.m_wsText = wsText;
-  calPart.m_dwTTOStyles =
-      bMultiLine ? FDE_TTOSTYLE_LineWrap : FDE_TTOSTYLE_SingleLine;
-  calPart.m_iTTOAlign = FDE_TTOALIGNMENT_TopLeft;
-  CFX_RectF rect;
-  FX_FLOAT fWidth = bMultiLine
-                        ? (iLineWidth > 0 ? (FX_FLOAT)iLineWidth
-                                          : FWL_WGT_CalcMultiLineDefWidth)
-                        : FWL_WGT_CalcWidth;
-  rect.Set(0, 0, fWidth, FWL_WGT_CalcHeight);
-  pTheme->CalcTextRect(&calPart, rect);
-  return CFX_SizeF(rect.width, rect.height);
-}
diff --git a/xfa/fwl/lightwidget/cfwl_widget.h b/xfa/fwl/lightwidget/cfwl_widget.h
index c230ce200c..16b1141aae 100644
--- a/xfa/fwl/lightwidget/cfwl_widget.h
+++ b/xfa/fwl/lightwidget/cfwl_widget.h
@@ -21,59 +21,37 @@ class CFWL_WidgetMgr;
 
 class CFWL_Widget {
  public:
+  CFWL_Widget();
   virtual ~CFWL_Widget();
 
   virtual IFWL_Widget* GetWidget();
   virtual const IFWL_Widget* GetWidget() const;
 
-  FWL_Error GetClassName(CFX_WideString& wsClass) const;
-  FWL_Type GetClassID() const;
-  virtual FX_BOOL IsInstance(const CFX_WideStringC& wsClass) const;
-
   FWL_Error GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize = FALSE);
-  FWL_Error GetGlobalRect(CFX_RectF& rect);
   FWL_Error SetWidgetRect(const CFX_RectF& rect);
+  FWL_Error GetGlobalRect(CFX_RectF& rect);
   FWL_Error GetClientRect(CFX_RectF& rtClient);
-  CFWL_Widget* GetParent();
-  FWL_Error SetParent(CFWL_Widget* pParent);
-  CFWL_Widget* GetOwner();
-  FWL_Error SetOwner(CFWL_Widget* pOwner);
-  uint32_t GetStyles();
+
   FWL_Error ModifyStyles(uint32_t dwStylesAdded, uint32_t dwStylesRemoved);
   uint32_t GetStylesEx();
   FWL_Error ModifyStylesEx(uint32_t dwStylesExAdded,
                            uint32_t dwStylesExRemoved);
+
   uint32_t GetStates();
   void SetStates(uint32_t dwStates, FX_BOOL bSet = TRUE);
-  void* GetLayoutItem() const;
+
   void SetLayoutItem(void* pItem);
 
-  FWL_Error SetPrivateData(void* module_id,
-                           void* pData,
-                           PD_CALLBACK_FREEDATA callback);
-  void* GetPrivateData(void* module_id);
-  FWL_Error Update();
-  FWL_Error LockUpdate();
-  FWL_Error UnlockUpdate();
+  void Update();
+  void LockUpdate();
+  void UnlockUpdate();
+
   FWL_WidgetHit HitTest(FX_FLOAT fx, FX_FLOAT fy);
-  FWL_Error TransformTo(CFWL_Widget* pWidget, FX_FLOAT& fx, FX_FLOAT& fy);
-  FWL_Error TransformTo(CFWL_Widget* pWidget, CFX_RectF& rt);
-  FWL_Error GetMatrix(CFX_Matrix& matrix, FX_BOOL bGlobal = FALSE);
-  FWL_Error SetMatrix(const CFX_Matrix& matrix);
+
   FWL_Error DrawWidget(CFX_Graphics* pGraphics,
                        const CFX_Matrix* pMatrix = nullptr);
-  IFWL_WidgetDelegate* SetDelegate(IFWL_WidgetDelegate* pDelegate);
-  FWL_Error Repaint(const CFX_RectF* pRect = nullptr);
-  FWL_Error SetFocus(FX_BOOL bFocus);
-  FWL_Error SetGrab(FX_BOOL bSet);
-  CFWL_Widget();
 
-  void RegisterEventTarget(CFWL_Widget* pEventSource = nullptr,
-                           uint32_t dwFilter = FWL_EVENT_ALL_MASK);
-  void DispatchEvent(CFWL_Event* pEvent);
-  CFX_SizeF CalcTextSize(const CFX_WideString& wsText,
-                         FX_BOOL bMultiLine = FALSE,
-                         int32_t iLineWidth = -1);
+  IFWL_WidgetDelegate* SetDelegate(IFWL_WidgetDelegate* pDelegate);
 
  protected:
   FWL_Error Initialize(const CFWL_WidgetProperties* pProperties = nullptr);
diff --git a/xfa/fwl/theme/cfwl_barcodetp.cpp b/xfa/fwl/theme/cfwl_barcodetp.cpp
index c6cc79e488..a3a450ec2c 100644
--- a/xfa/fwl/theme/cfwl_barcodetp.cpp
+++ b/xfa/fwl/theme/cfwl_barcodetp.cpp
@@ -18,9 +18,10 @@ bool CFWL_BarcodeTP::IsValidWidget(IFWL_Widget* pWidget) {
   return pWidget && pWidget->GetClassID() == FWL_Type::Barcode;
 }
 
-FX_BOOL CFWL_BarcodeTP::DrawBackground(CFWL_ThemeBackground* pParams) {
+void CFWL_BarcodeTP::DrawBackground(CFWL_ThemeBackground* pParams) {
   if (!pParams)
-    return FALSE;
+    return;
+
   switch (pParams->m_iPart) {
     case CFWL_Part::Border: {
       DrawBorder(pParams->m_pGraphics, &pParams->m_rtPart, &pParams->m_matrix);
@@ -36,7 +37,7 @@ FX_BOOL CFWL_BarcodeTP::DrawBackground(CFWL_ThemeBackground* pParams) {
                      &pParams->m_matrix);
       break;
     }
-    default: {}
+    default:
+      break;
   }
-  return TRUE;
 }
diff --git a/xfa/fwl/theme/cfwl_barcodetp.h b/xfa/fwl/theme/cfwl_barcodetp.h
index 6db7f15623..1eb34e705b 100644
--- a/xfa/fwl/theme/cfwl_barcodetp.h
+++ b/xfa/fwl/theme/cfwl_barcodetp.h
@@ -17,7 +17,7 @@ class CFWL_BarcodeTP : public CFWL_WidgetTP {
 
   // CFWL_WidgetTP
   bool IsValidWidget(IFWL_Widget* pWidget) override;
-  FX_BOOL DrawBackground(CFWL_ThemeBackground* pParams) override;
+  void DrawBackground(CFWL_ThemeBackground* pParams) override;
 };
 
 #endif  // XFA_FWL_THEME_CFWL_BARCODETP_H_
diff --git a/xfa/fwl/theme/cfwl_carettp.cpp b/xfa/fwl/theme/cfwl_carettp.cpp
index 28d606a2f3..1297b13497 100644
--- a/xfa/fwl/theme/cfwl_carettp.cpp
+++ b/xfa/fwl/theme/cfwl_carettp.cpp
@@ -19,14 +19,15 @@ bool CFWL_CaretTP::IsValidWidget(IFWL_Widget* pWidget) {
   return pWidget && pWidget->GetClassID() == FWL_Type::Caret;
 }
 
-FX_BOOL CFWL_CaretTP::DrawBackground(CFWL_ThemeBackground* pParams) {
+void CFWL_CaretTP::DrawBackground(CFWL_ThemeBackground* pParams) {
   if (!pParams)
-    return FALSE;
+    return;
+
   switch (pParams->m_iPart) {
     case CFWL_Part::Background: {
-      if (!(pParams->m_dwStates & CFWL_PartState_HightLight)) {
-        return TRUE;
-      }
+      if (!(pParams->m_dwStates & CFWL_PartState_HightLight))
+        return;
+
       DrawCaretBK(pParams->m_pGraphics, pParams->m_dwStates,
                   &(pParams->m_rtPart), (CFX_Color*)pParams->m_pData,
                   &(pParams->m_matrix));
@@ -35,8 +36,8 @@ FX_BOOL CFWL_CaretTP::DrawBackground(CFWL_ThemeBackground* pParams) {
     default:
       break;
   }
-  return TRUE;
 }
+
 void CFWL_CaretTP::DrawCaretBK(CFX_Graphics* pGraphics,
                                uint32_t dwStates,
                                const CFX_RectF* pRect,
diff --git a/xfa/fwl/theme/cfwl_carettp.h b/xfa/fwl/theme/cfwl_carettp.h
index faf37e725a..bc745be59d 100644
--- a/xfa/fwl/theme/cfwl_carettp.h
+++ b/xfa/fwl/theme/cfwl_carettp.h
@@ -16,7 +16,7 @@ class CFWL_CaretTP : public CFWL_WidgetTP {
 
   // CFWL_WidgetTP
   bool IsValidWidget(IFWL_Widget* pWidget) override;
-  FX_BOOL DrawBackground(CFWL_ThemeBackground* pParams) override;
+  void DrawBackground(CFWL_ThemeBackground* pParams) override;
 
  protected:
   void DrawCaretBK(CFX_Graphics* pGraphics,
diff --git a/xfa/fwl/theme/cfwl_checkboxtp.cpp b/xfa/fwl/theme/cfwl_checkboxtp.cpp
index b3dffdccf8..da3790a1df 100644
--- a/xfa/fwl/theme/cfwl_checkboxtp.cpp
+++ b/xfa/fwl/theme/cfwl_checkboxtp.cpp
@@ -45,23 +45,24 @@ uint32_t CFWL_CheckBoxTP::SetThemeID(IFWL_Widget* pWidget, uint32_t dwThemeID) {
   return CFWL_WidgetTP::SetThemeID(pWidget, dwThemeID);
 }
 
-FX_BOOL CFWL_CheckBoxTP::DrawText(CFWL_ThemeText* pParams) {
+void CFWL_CheckBoxTP::DrawText(CFWL_ThemeText* pParams) {
   if (!m_pTextOut)
-    return FALSE;
+    return;
+
   m_pTextOut->SetTextColor(pParams->m_dwStates & CFWL_PartState_Disabled
                                ? FWLTHEME_CAPACITY_TextDisColor
                                : FWLTHEME_CAPACITY_TextColor);
-  return CFWL_WidgetTP::DrawText(pParams);
+  CFWL_WidgetTP::DrawText(pParams);
 }
 
-FWL_Error CFWL_CheckBoxTP::Initialize() {
+void CFWL_CheckBoxTP::Initialize() {
   InitTTO();
-  return CFWL_WidgetTP::Initialize();
+  CFWL_WidgetTP::Initialize();
 }
 
-FWL_Error CFWL_CheckBoxTP::Finalize() {
+void CFWL_CheckBoxTP::Finalize() {
   FinalizeTTO();
-  return CFWL_WidgetTP::Finalize();
+  CFWL_WidgetTP::Finalize();
 }
 
 void CFWL_CheckBoxTP::DrawSignCheck(CFX_Graphics* pGraphics,
@@ -322,16 +323,15 @@ void CFWL_CheckBoxTP::InitCheckPath(FX_FLOAT fCheckLen) {
   }
 }
 
-FX_BOOL CFWL_CheckBoxTP::DrawBackground(CFWL_ThemeBackground* pParams) {
-  if (pParams->m_iPart != CFWL_Part::CheckBox) {
-    return FALSE;
-  }
+void CFWL_CheckBoxTP::DrawBackground(CFWL_ThemeBackground* pParams) {
+  if (pParams->m_iPart != CFWL_Part::CheckBox)
+    return;
+
   if ((pParams->m_dwStates & CFWL_PartState_Checked) ||
       (pParams->m_dwStates & CFWL_PartState_Neutral)) {
     DrawCheckSign(pParams->m_pWidget, pParams->m_pGraphics, pParams->m_rtPart,
                   pParams->m_dwStates, &pParams->m_matrix);
   }
-  return FALSE;
 }
 
 void CFWL_CheckBoxTP::DrawCheckSign(IFWL_Widget* pWidget,
diff --git a/xfa/fwl/theme/cfwl_checkboxtp.h b/xfa/fwl/theme/cfwl_checkboxtp.h
index cdc4ba1d57..37a8686170 100644
--- a/xfa/fwl/theme/cfwl_checkboxtp.h
+++ b/xfa/fwl/theme/cfwl_checkboxtp.h
@@ -18,12 +18,12 @@ class CFWL_CheckBoxTP : public CFWL_WidgetTP {
   ~CFWL_CheckBoxTP() override;
 
   // CFWL_WidgeTP
+  void Initialize() override;
+  void Finalize() override;
   bool IsValidWidget(IFWL_Widget* pWidget) override;
   uint32_t SetThemeID(IFWL_Widget* pWidget, uint32_t dwThemeID) override;
-  FX_BOOL DrawText(CFWL_ThemeText* pParams) override;
-  FX_BOOL DrawBackground(CFWL_ThemeBackground* pParams) override;
-  FWL_Error Initialize() override;
-  FWL_Error Finalize() override;
+  void DrawText(CFWL_ThemeText* pParams) override;
+  void DrawBackground(CFWL_ThemeBackground* pParams) override;
 
  protected:
   struct CKBThemeData {
diff --git a/xfa/fwl/theme/cfwl_comboboxtp.cpp b/xfa/fwl/theme/cfwl_comboboxtp.cpp
index d322a8e793..cdb892dc05 100644
--- a/xfa/fwl/theme/cfwl_comboboxtp.cpp
+++ b/xfa/fwl/theme/cfwl_comboboxtp.cpp
@@ -29,9 +29,10 @@ bool CFWL_ComboBoxTP::IsValidWidget(IFWL_Widget* pWidget) {
   return pWidget && pWidget->GetClassID() == FWL_Type::ComboBox;
 }
 
-FX_BOOL CFWL_ComboBoxTP::DrawBackground(CFWL_ThemeBackground* pParams) {
+void CFWL_ComboBoxTP::DrawBackground(CFWL_ThemeBackground* pParams) {
   if (!pParams)
-    return FALSE;
+    return;
+
   switch (pParams->m_iPart) {
     case CFWL_Part::Border: {
       DrawBorder(pParams->m_pGraphics, &pParams->m_rtPart, &pParams->m_matrix);
@@ -73,10 +74,11 @@ FX_BOOL CFWL_ComboBoxTP::DrawBackground(CFWL_ThemeBackground* pParams) {
       DrawStrethHandler(pParams, 0, &pParams->m_matrix);
       break;
     }
-    default: { return FALSE; }
+    default:
+      break;
   }
-  return TRUE;
 }
+
 void CFWL_ComboBoxTP::DrawStrethHandler(CFWL_ThemeBackground* pParams,
                                         uint32_t dwStates,
                                         CFX_Matrix* pMatrix) {
@@ -88,6 +90,7 @@ void CFWL_ComboBoxTP::DrawStrethHandler(CFWL_ThemeBackground* pParams,
   pParams->m_pGraphics->SetFillColor(&cr);
   pParams->m_pGraphics->FillPath(&path, FXFILL_WINDING, &pParams->m_matrix);
 }
+
 void* CFWL_ComboBoxTP::GetCapacity(CFWL_ThemePart* pThemePart,
                                    CFWL_WidgetCapacity dwCapacity) {
   if (dwCapacity == CFWL_WidgetCapacity::ComboFormHandler) {
@@ -115,10 +118,11 @@ void CFWL_ComboBoxTP::DrawDropDownButton(CFWL_ThemeBackground* pParams,
       break;
     }
     case CFWL_PartState_Disabled: {
-      eState = FWLTHEME_STATE_Disabale;
+      eState = FWLTHEME_STATE_Disable;
       break;
     }
-    default: {}
+    default:
+      break;
   }
   DrawArrowBtn(pParams->m_pGraphics, &pParams->m_rtPart,
                FWLTHEME_DIRECTION_Down, eState, &pParams->m_matrix);
diff --git a/xfa/fwl/theme/cfwl_comboboxtp.h b/xfa/fwl/theme/cfwl_comboboxtp.h
index 0480e60c30..6c248218b9 100644
--- a/xfa/fwl/theme/cfwl_comboboxtp.h
+++ b/xfa/fwl/theme/cfwl_comboboxtp.h
@@ -16,7 +16,7 @@ class CFWL_ComboBoxTP : public CFWL_WidgetTP {
 
   // CFWL_WidgetTP
   bool IsValidWidget(IFWL_Widget* pWidget) override;
-  FX_BOOL DrawBackground(CFWL_ThemeBackground* pParams) override;
+  void DrawBackground(CFWL_ThemeBackground* pParams) override;
   void* GetCapacity(CFWL_ThemePart* pThemePart,
                     CFWL_WidgetCapacity dwCapacity) override;
 
diff --git a/xfa/fwl/theme/cfwl_datetimepickertp.cpp b/xfa/fwl/theme/cfwl_datetimepickertp.cpp
index 36738d9a59..7aeee04a5b 100644
--- a/xfa/fwl/theme/cfwl_datetimepickertp.cpp
+++ b/xfa/fwl/theme/cfwl_datetimepickertp.cpp
@@ -17,9 +17,10 @@ bool CFWL_DateTimePickerTP::IsValidWidget(IFWL_Widget* pWidget) {
   return pWidget && pWidget->GetClassID() == FWL_Type::DateTimePicker;
 }
 
-FX_BOOL CFWL_DateTimePickerTP::DrawBackground(CFWL_ThemeBackground* pParams) {
+void CFWL_DateTimePickerTP::DrawBackground(CFWL_ThemeBackground* pParams) {
   if (!pParams)
-    return FALSE;
+    return;
+
   switch (pParams->m_iPart) {
     case CFWL_Part::Border: {
       DrawBorder(pParams->m_pGraphics, &pParams->m_rtPart, &pParams->m_matrix);
@@ -34,9 +35,9 @@ FX_BOOL CFWL_DateTimePickerTP::DrawBackground(CFWL_ThemeBackground* pParams) {
       DrawDropDownButton(pParams, &pParams->m_matrix);
       break;
     }
-    default: {}
+    default:
+      break;
   }
-  return TRUE;
 }
 
 void CFWL_DateTimePickerTP::DrawDropDownButton(CFWL_ThemeBackground* pParams,
@@ -58,10 +59,11 @@ void CFWL_DateTimePickerTP::DrawDropDownButton(CFWL_ThemeBackground* pParams,
       break;
     }
     case CFWL_PartState_Disabled: {
-      eState = FWLTHEME_STATE_Disabale;
+      eState = FWLTHEME_STATE_Disable;
       break;
     }
-    default: {}
+    default:
+      break;
   }
   DrawArrowBtn(pParams->m_pGraphics, &pParams->m_rtPart,
                FWLTHEME_DIRECTION_Down, eState, pMatrix);
diff --git a/xfa/fwl/theme/cfwl_datetimepickertp.h b/xfa/fwl/theme/cfwl_datetimepickertp.h
index 04bd910959..d9950de9ef 100644
--- a/xfa/fwl/theme/cfwl_datetimepickertp.h
+++ b/xfa/fwl/theme/cfwl_datetimepickertp.h
@@ -16,7 +16,7 @@ class CFWL_DateTimePickerTP : public CFWL_WidgetTP {
 
   // CFWL_WidgetTP
   bool IsValidWidget(IFWL_Widget* pWidget) override;
-  FX_BOOL DrawBackground(CFWL_ThemeBackground* pParams) override;
+  void DrawBackground(CFWL_ThemeBackground* pParams) override;
 
  protected:
   void DrawDropDownButton(CFWL_ThemeBackground* pParams, CFX_Matrix* pMatrix);
diff --git a/xfa/fwl/theme/cfwl_edittp.cpp b/xfa/fwl/theme/cfwl_edittp.cpp
index ca37f0c7e8..45d097dbfc 100644
--- a/xfa/fwl/theme/cfwl_edittp.cpp
+++ b/xfa/fwl/theme/cfwl_edittp.cpp
@@ -21,7 +21,7 @@ bool CFWL_EditTP::IsValidWidget(IFWL_Widget* pWidget) {
   return pWidget && pWidget->GetClassID() == FWL_Type::Edit;
 }
 
-FX_BOOL CFWL_EditTP::DrawBackground(CFWL_ThemeBackground* pParams) {
+void CFWL_EditTP::DrawBackground(CFWL_ThemeBackground* pParams) {
   if (CFWL_Part::CombTextLine == pParams->m_iPart) {
     CXFA_FFWidget* pWidget = XFA_ThemeGetOuterWidget(pParams->m_pWidget);
     FX_ARGB cr = 0xFF000000;
@@ -37,7 +37,7 @@ FX_BOOL CFWL_EditTP::DrawBackground(CFWL_ThemeBackground* pParams) {
     pParams->m_pGraphics->SetStrokeColor(&crLine);
     pParams->m_pGraphics->SetLineWidth(fWidth);
     pParams->m_pGraphics->StrokePath(pParams->m_pPath, &pParams->m_matrix);
-    return TRUE;
+    return;
   }
 
   switch (pParams->m_iPart) {
@@ -92,15 +92,17 @@ FX_BOOL CFWL_EditTP::DrawBackground(CFWL_ThemeBackground* pParams) {
       pParams->m_pGraphics->StrokePath(pParams->m_pPath, &pParams->m_matrix);
       break;
     }
-    default: { break; }
+    default:
+      break;
   }
-  return TRUE;
 }
-FWL_Error CFWL_EditTP::Initialize() {
+
+void CFWL_EditTP::Initialize() {
   InitTTO();
-  return CFWL_WidgetTP::Initialize();
+  CFWL_WidgetTP::Initialize();
 }
-FWL_Error CFWL_EditTP::Finalize() {
+
+void CFWL_EditTP::Finalize() {
   FinalizeTTO();
-  return CFWL_WidgetTP::Finalize();
+  CFWL_WidgetTP::Finalize();
 }
diff --git a/xfa/fwl/theme/cfwl_edittp.h b/xfa/fwl/theme/cfwl_edittp.h
index 22cbe778a3..24d2e982cd 100644
--- a/xfa/fwl/theme/cfwl_edittp.h
+++ b/xfa/fwl/theme/cfwl_edittp.h
@@ -15,10 +15,10 @@ class CFWL_EditTP : public CFWL_WidgetTP {
   ~CFWL_EditTP() override;
 
   // CFWL_WidgeTTP
+  void Initialize() override;
+  void Finalize() override;
   bool IsValidWidget(IFWL_Widget* pWidget) override;
-  FX_BOOL DrawBackground(CFWL_ThemeBackground* pParams) override;
-  FWL_Error Initialize() override;
-  FWL_Error Finalize() override;
+  void DrawBackground(CFWL_ThemeBackground* pParams) override;
 };
 
 #endif  // XFA_FWL_THEME_CFWL_EDITTP_H_
diff --git a/xfa/fwl/theme/cfwl_listboxtp.cpp b/xfa/fwl/theme/cfwl_listboxtp.cpp
index 69fc0719f8..304c3a8397 100644
--- a/xfa/fwl/theme/cfwl_listboxtp.cpp
+++ b/xfa/fwl/theme/cfwl_listboxtp.cpp
@@ -20,9 +20,10 @@ bool CFWL_ListBoxTP::IsValidWidget(IFWL_Widget* pWidget) {
   return pWidget && pWidget->GetClassID() == FWL_Type::ListBox;
 }
 
-FX_BOOL CFWL_ListBoxTP::DrawBackground(CFWL_ThemeBackground* pParams) {
+void CFWL_ListBoxTP::DrawBackground(CFWL_ThemeBackground* pParams) {
   if (!pParams)
-    return FALSE;
+    return;
+
   switch (pParams->m_iPart) {
     case CFWL_Part::Border: {
       DrawBorder(pParams->m_pGraphics, &pParams->m_rtPart, &pParams->m_matrix);
@@ -62,18 +63,21 @@ FX_BOOL CFWL_ListBoxTP::DrawBackground(CFWL_ThemeBackground* pParams) {
       FillSoildRect(pParams->m_pGraphics, color, &pParams->m_rtPart,
                     &pParams->m_matrix);
     }
-    default: {}
+    default:
+      break;
   }
-  return TRUE;
 }
-FWL_Error CFWL_ListBoxTP::Initialize() {
+
+void CFWL_ListBoxTP::Initialize() {
   InitTTO();
-  return CFWL_WidgetTP::Initialize();
+  CFWL_WidgetTP::Initialize();
 }
-FWL_Error CFWL_ListBoxTP::Finalize() {
+
+void CFWL_ListBoxTP::Finalize() {
   FinalizeTTO();
-  return CFWL_WidgetTP::Finalize();
+  CFWL_WidgetTP::Finalize();
 }
+
 void CFWL_ListBoxTP::DrawListBoxItem(CFX_Graphics* pGraphics,
                                      uint32_t dwStates,
                                      const CFX_RectF* prtItem,
@@ -96,9 +100,6 @@ void CFWL_ListBoxTP::DrawListBoxItem(CFX_Graphics* pGraphics,
     pGraphics->FillPath(&path, FXFILL_WINDING, pMatrix);
     pGraphics->RestoreGraphState();
   }
-  if (dwStates & CFWL_PartState_Focused) {
-    if (pData) {
-      DrawFocus(pGraphics, (CFX_RectF*)pData, pMatrix);
-    }
-  }
+  if (dwStates & CFWL_PartState_Focused && pData)
+    DrawFocus(pGraphics, (CFX_RectF*)pData, pMatrix);
 }
diff --git a/xfa/fwl/theme/cfwl_listboxtp.h b/xfa/fwl/theme/cfwl_listboxtp.h
index 9a6c457d5d..15967bd663 100644
--- a/xfa/fwl/theme/cfwl_listboxtp.h
+++ b/xfa/fwl/theme/cfwl_listboxtp.h
@@ -15,10 +15,10 @@ class CFWL_ListBoxTP : public CFWL_WidgetTP {
   ~CFWL_ListBoxTP() override;
 
   // CFWL_WidgetTP
+  void Initialize() override;
+  void Finalize() override;
   bool IsValidWidget(IFWL_Widget* pWidget) override;
-  FX_BOOL DrawBackground(CFWL_ThemeBackground* pParams) override;
-  FWL_Error Initialize() override;
-  FWL_Error Finalize() override;
+  void DrawBackground(CFWL_ThemeBackground* pParams) override;
 
  protected:
   void DrawListBoxItem(CFX_Graphics* pGraphics,
diff --git a/xfa/fwl/theme/cfwl_monthcalendartp.cpp b/xfa/fwl/theme/cfwl_monthcalendartp.cpp
index 01d2854c2d..b554483dcd 100644
--- a/xfa/fwl/theme/cfwl_monthcalendartp.cpp
+++ b/xfa/fwl/theme/cfwl_monthcalendartp.cpp
@@ -66,9 +66,10 @@ uint32_t CFWL_MonthCalendarTP::SetThemeID(IFWL_Widget* pWidget,
   return CFWL_WidgetTP::SetThemeID(pWidget, dwThemeID);
 }
 
-FX_BOOL CFWL_MonthCalendarTP::DrawBackground(CFWL_ThemeBackground* pParams) {
+void CFWL_MonthCalendarTP::DrawBackground(CFWL_ThemeBackground* pParams) {
   if (!pParams)
-    return FALSE;
+    return;
+
   switch (pParams->m_iPart) {
     case CFWL_Part::Border: {
       DrawBorder(pParams->m_pGraphics, &pParams->m_rtPart, &pParams->m_matrix);
@@ -119,13 +120,15 @@ FX_BOOL CFWL_MonthCalendarTP::DrawBackground(CFWL_ThemeBackground* pParams) {
       DrawWeekNumSep(pParams, &pParams->m_matrix);
       break;
     }
-    default: {}
+    default:
+      break;
   }
-  return TRUE;
 }
-FX_BOOL CFWL_MonthCalendarTP::DrawText(CFWL_ThemeText* pParams) {
+
+void CFWL_MonthCalendarTP::DrawText(CFWL_ThemeText* pParams) {
   if (!m_pTextOut)
-    return FALSE;
+    return;
+
   if ((pParams->m_iPart == CFWL_Part::DatesIn) &&
       !(pParams->m_dwStates & FWL_ITEMSTATE_MCD_Flag) &&
       (pParams->m_dwStates &
@@ -136,8 +139,9 @@ FX_BOOL CFWL_MonthCalendarTP::DrawText(CFWL_ThemeText* pParams) {
   } else {
     m_pTextOut->SetTextColor(0xFF000000);
   }
-  return CFWL_WidgetTP::DrawText(pParams);
+  CFWL_WidgetTP::DrawText(pParams);
 }
+
 void* CFWL_MonthCalendarTP::GetCapacity(CFWL_ThemePart* pThemePart,
                                         CFWL_WidgetCapacity dwCapacity) {
   FX_BOOL bDefPro = FALSE;
@@ -336,26 +340,30 @@ void* CFWL_MonthCalendarTP::GetCapacity(CFWL_ThemePart* pThemePart,
       wsResource = L"Today";
       return &wsResource;
     }
-    default: { bDefPro = TRUE; }
+    default:
+      bDefPro = TRUE;
+      break;
   }
   if (!bDefPro) {
-    if (bDwordVal) {
+    if (bDwordVal)
       return &m_dwValue;
-    }
     return &m_fValue;
   }
   return CFWL_WidgetTP::GetCapacity(pThemePart, dwCapacity);
 }
-FWL_Error CFWL_MonthCalendarTP::Initialize() {
+
+void CFWL_MonthCalendarTP::Initialize() {
   InitTTO();
-  return CFWL_WidgetTP::Initialize();
+  CFWL_WidgetTP::Initialize();
 }
-FWL_Error CFWL_MonthCalendarTP::Finalize() {
+
+void CFWL_MonthCalendarTP::Finalize() {
   FinalizeTTO();
-  return CFWL_WidgetTP::Finalize();
+  CFWL_WidgetTP::Finalize();
 }
-FX_BOOL CFWL_MonthCalendarTP::DrawTotalBK(CFWL_ThemeBackground* pParams,
-                                          CFX_Matrix* pMatrix) {
+
+void CFWL_MonthCalendarTP::DrawTotalBK(CFWL_ThemeBackground* pParams,
+                                       CFX_Matrix* pMatrix) {
   CFX_Path path;
   path.Create();
   CFX_RectF rtTotal(pParams->m_rtPart);
@@ -365,10 +373,10 @@ FX_BOOL CFWL_MonthCalendarTP::DrawTotalBK(CFWL_ThemeBackground* pParams,
   pParams->m_pGraphics->SetFillColor(&clrBK);
   pParams->m_pGraphics->FillPath(&path, FXFILL_WINDING, pMatrix);
   pParams->m_pGraphics->RestoreGraphState();
-  return TRUE;
 }
-FX_BOOL CFWL_MonthCalendarTP::DrawHeadBk(CFWL_ThemeBackground* pParams,
-                                         CFX_Matrix* pMatrix) {
+
+void CFWL_MonthCalendarTP::DrawHeadBk(CFWL_ThemeBackground* pParams,
+                                      CFX_Matrix* pMatrix) {
   CFX_Path path;
   path.Create();
   CFX_RectF rtHead = pParams->m_rtPart;
@@ -378,10 +386,10 @@ FX_BOOL CFWL_MonthCalendarTP::DrawHeadBk(CFWL_ThemeBackground* pParams,
   pParams->m_pGraphics->SetFillColor(&clrHeadBK);
   pParams->m_pGraphics->FillPath(&path, FXFILL_WINDING, pMatrix);
   pParams->m_pGraphics->RestoreGraphState();
-  return TRUE;
 }
-FX_BOOL CFWL_MonthCalendarTP::DrawLButton(CFWL_ThemeBackground* pParams,
-                                          CFX_Matrix* pMatrix) {
+
+void CFWL_MonthCalendarTP::DrawLButton(CFWL_ThemeBackground* pParams,
+                                       CFX_Matrix* pMatrix) {
   CFX_Path path;
   path.Create();
   CFX_RectF rtLBtn;
@@ -410,10 +418,10 @@ FX_BOOL CFWL_MonthCalendarTP::DrawLButton(CFWL_ThemeBackground* pParams,
   pParams->m_pGraphics->SetStrokeColor(&clrFlag);
   pParams->m_pGraphics->StrokePath(&path, pMatrix);
   pParams->m_pGraphics->RestoreGraphState();
-  return TRUE;
 }
-FX_BOOL CFWL_MonthCalendarTP::DrawRButton(CFWL_ThemeBackground* pParams,
-                                          CFX_Matrix* pMatrix) {
+
+void CFWL_MonthCalendarTP::DrawRButton(CFWL_ThemeBackground* pParams,
+                                       CFX_Matrix* pMatrix) {
   CFX_Path path;
   path.Create();
   CFX_RectF rtRBtn;
@@ -442,10 +450,10 @@ FX_BOOL CFWL_MonthCalendarTP::DrawRButton(CFWL_ThemeBackground* pParams,
   pParams->m_pGraphics->SetStrokeColor(&clrFlag);
   pParams->m_pGraphics->StrokePath(&path, pMatrix);
   pParams->m_pGraphics->RestoreGraphState();
-  return TRUE;
 }
-FX_BOOL CFWL_MonthCalendarTP::DrawHSeperator(CFWL_ThemeBackground* pParams,
-                                             CFX_Matrix* pMatrix) {
+
+void CFWL_MonthCalendarTP::DrawHSeperator(CFWL_ThemeBackground* pParams,
+                                          CFX_Matrix* pMatrix) {
   CFX_Path path;
   path.Create();
   CFX_RectF rtHSep;
@@ -457,11 +465,10 @@ FX_BOOL CFWL_MonthCalendarTP::DrawHSeperator(CFWL_ThemeBackground* pParams,
   pParams->m_pGraphics->SetStrokeColor(&clrHSep);
   pParams->m_pGraphics->StrokePath(&path, pMatrix);
   pParams->m_pGraphics->RestoreGraphState();
-  return TRUE;
 }
 
-FX_BOOL CFWL_MonthCalendarTP::DrawWeekNumSep(CFWL_ThemeBackground* pParams,
-                                             CFX_Matrix* pMatrix) {
+void CFWL_MonthCalendarTP::DrawWeekNumSep(CFWL_ThemeBackground* pParams,
+                                          CFX_Matrix* pMatrix) {
   CFX_Path path;
   path.Create();
   CFX_RectF rtWeekSep;
@@ -473,11 +480,10 @@ FX_BOOL CFWL_MonthCalendarTP::DrawWeekNumSep(CFWL_ThemeBackground* pParams,
   pParams->m_pGraphics->SetStrokeColor(&clrHSep);
   pParams->m_pGraphics->StrokePath(&path, pMatrix);
   pParams->m_pGraphics->RestoreGraphState();
-  return TRUE;
 }
 
-FX_BOOL CFWL_MonthCalendarTP::DrawDatesInBK(CFWL_ThemeBackground* pParams,
-                                            CFX_Matrix* pMatrix) {
+void CFWL_MonthCalendarTP::DrawDatesInBK(CFWL_ThemeBackground* pParams,
+                                         CFX_Matrix* pMatrix) {
   pParams->m_pGraphics->SaveGraphState();
   if (pParams->m_dwStates & CFWL_PartState_Selected) {
     CFX_Path path;
@@ -501,11 +507,10 @@ FX_BOOL CFWL_MonthCalendarTP::DrawDatesInBK(CFWL_ThemeBackground* pParams,
     pParams->m_pGraphics->FillPath(&path, FXFILL_WINDING, pMatrix);
   }
   pParams->m_pGraphics->RestoreGraphState();
-  return FALSE;
 }
 
-FX_BOOL CFWL_MonthCalendarTP::DrawDatesInCircle(CFWL_ThemeBackground* pParams,
-                                                CFX_Matrix* pMatrix) {
+void CFWL_MonthCalendarTP::DrawDatesInCircle(CFWL_ThemeBackground* pParams,
+                                             CFX_Matrix* pMatrix) {
   CFX_Path path;
   path.Create();
   CFX_RectF rtSelDay;
@@ -517,11 +522,10 @@ FX_BOOL CFWL_MonthCalendarTP::DrawDatesInCircle(CFWL_ThemeBackground* pParams,
   pParams->m_pGraphics->SetStrokeColor(&clrSelDayBK);
   pParams->m_pGraphics->StrokePath(&path, pMatrix);
   pParams->m_pGraphics->RestoreGraphState();
-  return TRUE;
 }
 
-FX_BOOL CFWL_MonthCalendarTP::DrawTodayCircle(CFWL_ThemeBackground* pParams,
-                                              CFX_Matrix* pMatrix) {
+void CFWL_MonthCalendarTP::DrawTodayCircle(CFWL_ThemeBackground* pParams,
+                                           CFX_Matrix* pMatrix) {
   CFX_Path path;
   path.Create();
   CFX_RectF rtTodayCircle;
@@ -533,7 +537,6 @@ FX_BOOL CFWL_MonthCalendarTP::DrawTodayCircle(CFWL_ThemeBackground* pParams,
   pParams->m_pGraphics->SetStrokeColor(&clrTodayCircle);
   pParams->m_pGraphics->StrokePath(&path, pMatrix);
   pParams->m_pGraphics->RestoreGraphState();
-  return TRUE;
 }
 
 FWLTHEME_STATE CFWL_MonthCalendarTP::GetState(uint32_t dwFWLStates) {
diff --git a/xfa/fwl/theme/cfwl_monthcalendartp.h b/xfa/fwl/theme/cfwl_monthcalendartp.h
index b69b32c613..7feb0f337a 100644
--- a/xfa/fwl/theme/cfwl_monthcalendartp.h
+++ b/xfa/fwl/theme/cfwl_monthcalendartp.h
@@ -17,14 +17,14 @@ class CFWL_MonthCalendarTP : public CFWL_WidgetTP {
   ~CFWL_MonthCalendarTP() override;
 
   // CFWL_WidgetTP
+  void Initialize() override;
+  void Finalize() override;
   bool IsValidWidget(IFWL_Widget* pWidget) override;
   uint32_t SetThemeID(IFWL_Widget* pWidget, uint32_t dwThemeID) override;
-  FX_BOOL DrawBackground(CFWL_ThemeBackground* pParams) override;
-  FX_BOOL DrawText(CFWL_ThemeText* pParams) override;
+  void DrawBackground(CFWL_ThemeBackground* pParams) override;
+  void DrawText(CFWL_ThemeText* pParams) override;
   void* GetCapacity(CFWL_ThemePart* pThemePart,
                     CFWL_WidgetCapacity dwCapacity) override;
-  FWL_Error Initialize() override;
-  FWL_Error Finalize() override;
 
  protected:
   struct MCThemeData {
@@ -37,15 +37,15 @@ class CFWL_MonthCalendarTP : public CFWL_WidgetTP {
     FX_ARGB clrBK;
   };
 
-  FX_BOOL DrawTotalBK(CFWL_ThemeBackground* pParams, CFX_Matrix* pMatrix);
-  FX_BOOL DrawHeadBk(CFWL_ThemeBackground* pParams, CFX_Matrix* pMatrix);
-  FX_BOOL DrawLButton(CFWL_ThemeBackground* pParams, CFX_Matrix* pMatrix);
-  FX_BOOL DrawRButton(CFWL_ThemeBackground* pParams, CFX_Matrix* pMatrix);
-  FX_BOOL DrawDatesInBK(CFWL_ThemeBackground* pParams, CFX_Matrix* pMatrix);
-  FX_BOOL DrawDatesInCircle(CFWL_ThemeBackground* pParams, CFX_Matrix* pMatrix);
-  FX_BOOL DrawTodayCircle(CFWL_ThemeBackground* pParams, CFX_Matrix* pMatrix);
-  FX_BOOL DrawHSeperator(CFWL_ThemeBackground* pParams, CFX_Matrix* pMatrix);
-  FX_BOOL DrawWeekNumSep(CFWL_ThemeBackground* pParams, CFX_Matrix* pMatrix);
+  void DrawTotalBK(CFWL_ThemeBackground* pParams, CFX_Matrix* pMatrix);
+  void DrawHeadBk(CFWL_ThemeBackground* pParams, CFX_Matrix* pMatrix);
+  void DrawLButton(CFWL_ThemeBackground* pParams, CFX_Matrix* pMatrix);
+  void DrawRButton(CFWL_ThemeBackground* pParams, CFX_Matrix* pMatrix);
+  void DrawDatesInBK(CFWL_ThemeBackground* pParams, CFX_Matrix* pMatrix);
+  void DrawDatesInCircle(CFWL_ThemeBackground* pParams, CFX_Matrix* pMatrix);
+  void DrawTodayCircle(CFWL_ThemeBackground* pParams, CFX_Matrix* pMatrix);
+  void DrawHSeperator(CFWL_ThemeBackground* pParams, CFX_Matrix* pMatrix);
+  void DrawWeekNumSep(CFWL_ThemeBackground* pParams, CFX_Matrix* pMatrix);
   FWLTHEME_STATE GetState(uint32_t dwFWLStates);
   void SetThemeData(uint32_t dwThemeID);
 
diff --git a/xfa/fwl/theme/cfwl_pictureboxtp.cpp b/xfa/fwl/theme/cfwl_pictureboxtp.cpp
index 2604156e41..98ba21fd5e 100644
--- a/xfa/fwl/theme/cfwl_pictureboxtp.cpp
+++ b/xfa/fwl/theme/cfwl_pictureboxtp.cpp
@@ -18,9 +18,9 @@ bool CFWL_PictureBoxTP::IsValidWidget(IFWL_Widget* pWidget) {
   return pWidget && pWidget->GetClassID() == FWL_Type::PictureBox;
 }
 
-FX_BOOL CFWL_PictureBoxTP::DrawBackground(CFWL_ThemeBackground* pParams) {
+void CFWL_PictureBoxTP::DrawBackground(CFWL_ThemeBackground* pParams) {
   if (!pParams)
-    return FALSE;
+    return;
 
   switch (pParams->m_iPart) {
     case CFWL_Part::Border: {
@@ -35,5 +35,4 @@ FX_BOOL CFWL_PictureBoxTP::DrawBackground(CFWL_ThemeBackground* pParams) {
     default:
       break;
   }
-  return TRUE;
 }
diff --git a/xfa/fwl/theme/cfwl_pictureboxtp.h b/xfa/fwl/theme/cfwl_pictureboxtp.h
index 876e8d2042..24f658bd11 100644
--- a/xfa/fwl/theme/cfwl_pictureboxtp.h
+++ b/xfa/fwl/theme/cfwl_pictureboxtp.h
@@ -16,7 +16,7 @@ class CFWL_PictureBoxTP : public CFWL_WidgetTP {
 
   // CFWL_WidgetTP
   bool IsValidWidget(IFWL_Widget* pWidget) override;
-  FX_BOOL DrawBackground(CFWL_ThemeBackground* pParams) override;
+  void DrawBackground(CFWL_ThemeBackground* pParams) override;
 };
 
 #endif  // XFA_FWL_THEME_CFWL_PICTUREBOXTP_H_
diff --git a/xfa/fwl/theme/cfwl_pushbuttontp.cpp b/xfa/fwl/theme/cfwl_pushbuttontp.cpp
index 62b8ffef65..20446da54b 100644
--- a/xfa/fwl/theme/cfwl_pushbuttontp.cpp
+++ b/xfa/fwl/theme/cfwl_pushbuttontp.cpp
@@ -29,7 +29,8 @@ uint32_t CFWL_PushButtonTP::SetThemeID(IFWL_Widget* pWidget,
   SetThemeData(FWL_GetThemeColor(dwThemeID));
   return CFWL_WidgetTP::SetThemeID(pWidget, dwThemeID);
 }
-FX_BOOL CFWL_PushButtonTP::DrawBackground(CFWL_ThemeBackground* pParams) {
+
+void CFWL_PushButtonTP::DrawBackground(CFWL_ThemeBackground* pParams) {
   switch (pParams->m_iPart) {
     case CFWL_Part::Border: {
       DrawBorder(pParams->m_pGraphics, &pParams->m_rtPart, &pParams->m_matrix);
@@ -87,10 +88,11 @@ FX_BOOL CFWL_PushButtonTP::DrawBackground(CFWL_ThemeBackground* pParams) {
       pGraphics->RestoreGraphState();
       break;
     }
-    default: {}
+    default:
+      break;
   }
-  return TRUE;
 }
+
 void* CFWL_PushButtonTP::GetCapacity(CFWL_ThemePart* pThemePart,
                                      CFWL_WidgetCapacity dwCapacity) {
   if (dwCapacity == CFWL_WidgetCapacity::Margin) {
@@ -99,14 +101,17 @@ void* CFWL_PushButtonTP::GetCapacity(CFWL_ThemePart* pThemePart,
   }
   return CFWL_WidgetTP::GetCapacity(pThemePart, dwCapacity);
 }
-FWL_Error CFWL_PushButtonTP::Initialize() {
+
+void CFWL_PushButtonTP::Initialize() {
   InitTTO();
-  return CFWL_WidgetTP::Initialize();
+  CFWL_WidgetTP::Initialize();
 }
-FWL_Error CFWL_PushButtonTP::Finalize() {
+
+void CFWL_PushButtonTP::Finalize() {
   FinalizeTTO();
-  return CFWL_WidgetTP::Finalize();
+  CFWL_WidgetTP::Finalize();
 }
+
 void CFWL_PushButtonTP::SetThemeData(uint32_t dwID) {
   if (dwID) {
     m_pThemeData->clrBorder[0] = ArgbEncode(255, 55, 98, 6);
@@ -152,6 +157,7 @@ void CFWL_PushButtonTP::SetThemeData(uint32_t dwID) {
     m_pThemeData->clrFill[4] = ArgbEncode(255, 245, 244, 234);
   }
 }
+
 int32_t CFWL_PushButtonTP::GetColorID(uint32_t dwStates) const {
   int32_t color = 0;
   if (dwStates & CFWL_PartState_Disabled)
diff --git a/xfa/fwl/theme/cfwl_pushbuttontp.h b/xfa/fwl/theme/cfwl_pushbuttontp.h
index 053ca28831..317d0d2336 100644
--- a/xfa/fwl/theme/cfwl_pushbuttontp.h
+++ b/xfa/fwl/theme/cfwl_pushbuttontp.h
@@ -17,13 +17,13 @@ class CFWL_PushButtonTP : public CFWL_WidgetTP {
   ~CFWL_PushButtonTP() override;
 
   // CFWL_WidgetTP
+  void Initialize() override;
+  void Finalize() override;
   bool IsValidWidget(IFWL_Widget* pWidget) override;
   uint32_t SetThemeID(IFWL_Widget* pWidget, uint32_t dwThemeID) override;
-  FX_BOOL DrawBackground(CFWL_ThemeBackground* pParams) override;
+  void DrawBackground(CFWL_ThemeBackground* pParams) override;
   void* GetCapacity(CFWL_ThemePart* pThemePart,
                     CFWL_WidgetCapacity dwCapacity) override;
-  FWL_Error Initialize() override;
-  FWL_Error Finalize() override;
 
  protected:
   struct PBThemeData {
diff --git a/xfa/fwl/theme/cfwl_scrollbartp.cpp b/xfa/fwl/theme/cfwl_scrollbartp.cpp
index e680bdd6db..4d23d3e193 100644
--- a/xfa/fwl/theme/cfwl_scrollbartp.cpp
+++ b/xfa/fwl/theme/cfwl_scrollbartp.cpp
@@ -28,6 +28,7 @@ CFWL_ScrollBarTP::~CFWL_ScrollBarTP() {}
 bool CFWL_ScrollBarTP::IsValidWidget(IFWL_Widget* pWidget) {
   return pWidget && pWidget->GetClassID() == FWL_Type::ScrollBar;
 }
+
 void* CFWL_ScrollBarTP::GetCapacity(CFWL_ThemePart* pThemePart,
                                     CFWL_WidgetCapacity dwCapacity) {
   if (dwCapacity == CFWL_WidgetCapacity::Size) {
@@ -36,15 +37,18 @@ void* CFWL_ScrollBarTP::GetCapacity(CFWL_ThemePart* pThemePart,
   }
   return CFWL_WidgetTP::GetCapacity(pThemePart, dwCapacity);
 }
+
 uint32_t CFWL_ScrollBarTP::SetThemeID(IFWL_Widget* pWidget,
                                       uint32_t dwThemeID) {
   if (m_pThemeData)
     SetThemeData(FWL_GetThemeColor(dwThemeID));
   return CFWL_WidgetTP::SetThemeID(pWidget, dwThemeID);
 }
-FX_BOOL CFWL_ScrollBarTP::DrawBackground(CFWL_ThemeBackground* pParams) {
+
+void CFWL_ScrollBarTP::DrawBackground(CFWL_ThemeBackground* pParams) {
   if (!pParams)
-    return FALSE;
+    return;
+
   IFWL_Widget* pWidget = pParams->m_pWidget;
   FWLTHEME_STATE eState = FWLTHEME_STATE_Normal;
   if (pParams->m_dwStates & CFWL_PartState_Hovered)
@@ -52,7 +56,8 @@ FX_BOOL CFWL_ScrollBarTP::DrawBackground(CFWL_ThemeBackground* pParams) {
   else if (pParams->m_dwStates & CFWL_PartState_Pressed)
     eState = FWLTHEME_STATE_Pressed;
   else if (pParams->m_dwStates & CFWL_PartState_Disabled)
-    eState = FWLTHEME_STATE_Disabale;
+    eState = FWLTHEME_STATE_Disable;
+
   CFX_Graphics* pGraphics = pParams->m_pGraphics;
   CFX_RectF* pRect = &pParams->m_rtPart;
   FX_BOOL bVert = pWidget->GetStylesEx();
@@ -81,9 +86,9 @@ FX_BOOL CFWL_ScrollBarTP::DrawBackground(CFWL_ThemeBackground* pParams) {
       DrawTrack(pGraphics, pRect, bVert, eState, FALSE, &pParams->m_matrix);
       break;
     }
-    default: {}
+    default:
+      break;
   }
-  return TRUE;
 }
 
 void CFWL_ScrollBarTP::DrawThumbBtn(CFX_Graphics* pGraphics,
@@ -92,17 +97,17 @@ void CFWL_ScrollBarTP::DrawThumbBtn(CFX_Graphics* pGraphics,
                                     FWLTHEME_STATE eState,
                                     FX_BOOL bPawButton,
                                     CFX_Matrix* pMatrix) {
-  if (eState < FWLTHEME_STATE_Normal || eState > FWLTHEME_STATE_Disabale) {
+  if (eState < FWLTHEME_STATE_Normal || eState > FWLTHEME_STATE_Disable)
     return;
-  }
+
   CFX_Path path;
   path.Create();
   CFX_RectF rect(*pRect);
   if (bVert) {
     rect.Deflate(1, 0);
-    if (rect.IsEmpty(0.1f)) {
+    if (rect.IsEmpty(0.1f))
       return;
-    }
+
     path.AddRectangle(rect.left, rect.top, rect.width, rect.height);
     DrawAxialShading(pGraphics, rect.left, rect.top, rect.right(), rect.top,
                      m_pThemeData->clrBtnBK[eState - 1][0],
@@ -116,9 +121,9 @@ void CFWL_ScrollBarTP::DrawThumbBtn(CFX_Graphics* pGraphics,
     pGraphics->RestoreGraphState();
   } else {
     rect.Deflate(0, 1);
-    if (rect.IsEmpty(0.1f)) {
+    if (rect.IsEmpty(0.1f))
       return;
-    }
+
     path.AddRectangle(rect.left, rect.top, rect.width, rect.height);
     DrawAxialShading(pGraphics, rect.left, rect.top, rect.left, rect.bottom(),
                      m_pThemeData->clrBtnBK[eState - 1][0],
@@ -132,6 +137,7 @@ void CFWL_ScrollBarTP::DrawThumbBtn(CFX_Graphics* pGraphics,
     pGraphics->RestoreGraphState();
   }
 }
+
 void CFWL_ScrollBarTP::DrawPaw(CFX_Graphics* pGraphics,
                                const CFX_RectF* pRect,
                                FX_BOOL bVert,
@@ -207,15 +213,16 @@ void CFWL_ScrollBarTP::DrawPaw(CFX_Graphics* pGraphics,
     pGraphics->StrokePath(&path, pMatrix);
   }
 }
+
 void CFWL_ScrollBarTP::DrawTrack(CFX_Graphics* pGraphics,
                                  const CFX_RectF* pRect,
                                  FX_BOOL bVert,
                                  FWLTHEME_STATE eState,
                                  FX_BOOL bLowerTrack,
                                  CFX_Matrix* pMatrix) {
-  if (eState < FWLTHEME_STATE_Normal || eState > FWLTHEME_STATE_Disabale) {
+  if (eState < FWLTHEME_STATE_Normal || eState > FWLTHEME_STATE_Disable)
     return;
-  }
+
   pGraphics->SaveGraphState();
   CFX_Color colorLine(ArgbEncode(255, 238, 237, 229));
   CFX_Path path;
@@ -242,6 +249,7 @@ void CFWL_ScrollBarTP::DrawTrack(CFX_Graphics* pGraphics,
   DrawAxialShading(pGraphics, x1, y1, x2, y2, m_pThemeData->clrTrackBKStart,
                    m_pThemeData->clrTrackBKEnd, &path, FXFILL_WINDING, pMatrix);
 }
+
 void CFWL_ScrollBarTP::DrawMaxMinBtn(CFX_Graphics* pGraphics,
                                      const CFX_RectF* pRect,
                                      FWLTHEME_DIRECTION eDict,
diff --git a/xfa/fwl/theme/cfwl_scrollbartp.h b/xfa/fwl/theme/cfwl_scrollbartp.h
index 6643bb700b..6caf8f4917 100644
--- a/xfa/fwl/theme/cfwl_scrollbartp.h
+++ b/xfa/fwl/theme/cfwl_scrollbartp.h
@@ -19,7 +19,7 @@ class CFWL_ScrollBarTP : public CFWL_WidgetTP {
   // CFWL_WidgetTP
   bool IsValidWidget(IFWL_Widget* pWidget) override;
   uint32_t SetThemeID(IFWL_Widget* pWidget, uint32_t dwThemeID) override;
-  FX_BOOL DrawBackground(CFWL_ThemeBackground* pParams) override;
+  void DrawBackground(CFWL_ThemeBackground* pParams) override;
   void* GetCapacity(CFWL_ThemePart* pThemePart,
                     CFWL_WidgetCapacity dwCapacity) override;
 
diff --git a/xfa/fwl/theme/cfwl_utils.h b/xfa/fwl/theme/cfwl_utils.h
index b253722198..51bd07fbf9 100644
--- a/xfa/fwl/theme/cfwl_utils.h
+++ b/xfa/fwl/theme/cfwl_utils.h
@@ -19,7 +19,7 @@ enum FWLTHEME_STATE {
   FWLTHEME_STATE_Normal = 1,
   FWLTHEME_STATE_Hover,
   FWLTHEME_STATE_Pressed,
-  FWLTHEME_STATE_Disabale
+  FWLTHEME_STATE_Disable
 };
 
 enum FWLTHEME_DIRECTION {
diff --git a/xfa/fwl/theme/cfwl_widgettp.cpp b/xfa/fwl/theme/cfwl_widgettp.cpp
index 5c54afd8fc..f313511164 100644
--- a/xfa/fwl/theme/cfwl_widgettp.cpp
+++ b/xfa/fwl/theme/cfwl_widgettp.cpp
@@ -52,29 +52,16 @@ uint32_t CFWL_WidgetTP::SetThemeID(IFWL_Widget* pWidget, uint32_t dwThemeID) {
   return dwOld;
 }
 
-FWL_Error CFWL_WidgetTP::GetThemeMatrix(IFWL_Widget* pWidget,
-                                        CFX_Matrix& matrix) {
-  matrix.Set(_ctm.a, _ctm.b, _ctm.c, _ctm.d, _ctm.e, _ctm.f);
-  return FWL_Error::Succeeded;
-}
-
-FWL_Error CFWL_WidgetTP::SetThemeMatrix(IFWL_Widget* pWidget,
-                                        const CFX_Matrix& matrix) {
-  _ctm.Set(matrix.a, matrix.b, matrix.c, matrix.d, matrix.e, matrix.f);
-  return FWL_Error::Succeeded;
-}
+void CFWL_WidgetTP::DrawBackground(CFWL_ThemeBackground* pParams) {}
 
-FX_BOOL CFWL_WidgetTP::DrawBackground(CFWL_ThemeBackground* pParams) {
-  return TRUE;
-}
-
-FX_BOOL CFWL_WidgetTP::DrawText(CFWL_ThemeText* pParams) {
+void CFWL_WidgetTP::DrawText(CFWL_ThemeText* pParams) {
   if (!m_pTextOut)
     InitTTO();
 
   int32_t iLen = pParams->m_wsText.GetLength();
   if (iLen <= 0)
-    return FALSE;
+    return;
+
   CFX_Graphics* pGraphics = pParams->m_pGraphics;
   m_pTextOut->SetRenderDevice(pGraphics->GetRenderDevice());
   m_pTextOut->SetStyles(pParams->m_dwTTOStyles);
@@ -83,7 +70,6 @@ FX_BOOL CFWL_WidgetTP::DrawText(CFWL_ThemeText* pParams) {
   pMatrix->Concat(*pGraphics->GetMatrix());
   m_pTextOut->SetMatrix(*pMatrix);
   m_pTextOut->DrawLogicText(pParams->m_wsText.c_str(), iLen, pParams->m_rtPart);
-  return TRUE;
 }
 
 void* CFWL_WidgetTP::GetCapacity(CFWL_ThemePart* pThemePart,
@@ -137,66 +123,60 @@ void* CFWL_WidgetTP::GetCapacity(CFWL_ThemePart* pThemePart,
       m_rtMargin.Set(0, 0, 0, 0);
       return &m_rtMargin;
     }
-    default: { return nullptr; }
+    default:
+      return nullptr;
   }
   return &m_fValue;
 }
 
-FX_BOOL CFWL_WidgetTP::IsCustomizedLayout(IFWL_Widget* pWidget) {
-  return FWL_GetThemeLayout(m_dwThemeID);
+bool CFWL_WidgetTP::IsCustomizedLayout(IFWL_Widget* pWidget) {
+  return !!FWL_GetThemeLayout(m_dwThemeID);
 }
 
-FX_BOOL CFWL_WidgetTP::CalcTextRect(CFWL_ThemeText* pParams, CFX_RectF& rect) {
-  if (!pParams)
-    return FALSE;
-  if (!m_pTextOut)
-    return FALSE;
+void CFWL_WidgetTP::CalcTextRect(CFWL_ThemeText* pParams, CFX_RectF& rect) {
+  if (!pParams || !m_pTextOut)
+    return;
+
   m_pTextOut->SetAlignment(pParams->m_iTTOAlign);
   m_pTextOut->SetStyles(pParams->m_dwTTOStyles | FDE_TTOSTYLE_ArabicContext);
   m_pTextOut->CalcLogicSize(pParams->m_wsText.c_str(),
                             pParams->m_wsText.GetLength(), rect);
-  return TRUE;
 }
 
-FWL_Error CFWL_WidgetTP::Initialize() {
+void CFWL_WidgetTP::Initialize() {
   m_dwThemeID = 0;
-  _ctm.SetIdentity();
-  return FWL_Error::Succeeded;
 }
 
-FWL_Error CFWL_WidgetTP::Finalize() {
+void CFWL_WidgetTP::Finalize() {
   if (!m_pTextOut)
     FinalizeTTO();
-  return FWL_Error::Succeeded;
 }
 
 CFWL_WidgetTP::~CFWL_WidgetTP() {}
 
-FWL_Error CFWL_WidgetTP::SetFont(IFWL_Widget* pWidget,
-                                 const FX_WCHAR* strFont,
-                                 FX_FLOAT fFontSize,
-                                 FX_ARGB rgbFont) {
+void CFWL_WidgetTP::SetFont(IFWL_Widget* pWidget,
+                            const FX_WCHAR* strFont,
+                            FX_FLOAT fFontSize,
+                            FX_ARGB rgbFont) {
   if (!m_pTextOut)
-    return FWL_Error::Succeeded;
+    return;
 
   m_pFDEFont = CFWL_FontManager::GetInstance()->FindFont(strFont, 0, 0);
   m_pTextOut->SetFont(m_pFDEFont);
   m_pTextOut->SetFontSize(fFontSize);
   m_pTextOut->SetTextColor(rgbFont);
-  return FWL_Error::Succeeded;
 }
 
-FWL_Error CFWL_WidgetTP::SetFont(IFWL_Widget* pWidget,
-                                 CFGAS_GEFont* pFont,
-                                 FX_FLOAT fFontSize,
-                                 FX_ARGB rgbFont) {
+void CFWL_WidgetTP::SetFont(IFWL_Widget* pWidget,
+                            CFGAS_GEFont* pFont,
+                            FX_FLOAT fFontSize,
+                            FX_ARGB rgbFont) {
   if (!m_pTextOut)
-    return FWL_Error::Succeeded;
+    return;
 
   m_pTextOut->SetFont(pFont);
   m_pTextOut->SetFontSize(fFontSize);
   m_pTextOut->SetTextColor(rgbFont);
-  return FWL_Error::Succeeded;
 }
 
 CFGAS_GEFont* CFWL_WidgetTP::GetFont(IFWL_Widget* pWidget) {
@@ -206,9 +186,9 @@ CFGAS_GEFont* CFWL_WidgetTP::GetFont(IFWL_Widget* pWidget) {
 CFWL_WidgetTP::CFWL_WidgetTP()
     : m_dwRefCount(1), m_pFDEFont(nullptr), m_dwThemeID(0) {}
 
-FWL_Error CFWL_WidgetTP::InitTTO() {
+void CFWL_WidgetTP::InitTTO() {
   if (m_pTextOut)
-    return FWL_Error::Succeeded;
+    return;
 
   m_pFDEFont =
       CFWL_FontManager::GetInstance()->FindFont(FX_WSTRC(L"Helvetica"), 0, 0);
@@ -217,12 +197,10 @@ FWL_Error CFWL_WidgetTP::InitTTO() {
   m_pTextOut->SetFontSize(FWLTHEME_CAPACITY_FontSize);
   m_pTextOut->SetTextColor(FWLTHEME_CAPACITY_TextColor);
   m_pTextOut->SetEllipsisString(L"...");
-  return FWL_Error::Succeeded;
 }
 
-FWL_Error CFWL_WidgetTP::FinalizeTTO() {
+void CFWL_WidgetTP::FinalizeTTO() {
   m_pTextOut.reset();
-  return FWL_Error::Succeeded;
 }
 
 void CFWL_WidgetTP::DrawEdge(CFX_Graphics* pGraphics,
diff --git a/xfa/fwl/theme/cfwl_widgettp.h b/xfa/fwl/theme/cfwl_widgettp.h
index ddd504b050..02f3981077 100644
--- a/xfa/fwl/theme/cfwl_widgettp.h
+++ b/xfa/fwl/theme/cfwl_widgettp.h
@@ -107,36 +107,36 @@ class CFWL_WidgetTP {
  public:
   virtual ~CFWL_WidgetTP();
 
-  virtual FWL_Error Initialize();
-  virtual FWL_Error Finalize();
+  virtual void Initialize();
+  virtual void Finalize();
 
   virtual bool IsValidWidget(IFWL_Widget* pWidget);
   virtual uint32_t GetThemeID(IFWL_Widget* pWidget);
   virtual uint32_t SetThemeID(IFWL_Widget* pWidget, uint32_t dwThemeID);
-  virtual FWL_Error GetThemeMatrix(IFWL_Widget* pWidget, CFX_Matrix& matrix);
-  virtual FWL_Error SetThemeMatrix(IFWL_Widget* pWidget,
-                                   const CFX_Matrix& matrix);
-  virtual FX_BOOL DrawBackground(CFWL_ThemeBackground* pParams);
-  virtual FX_BOOL DrawText(CFWL_ThemeText* pParams);
+
+  virtual void DrawBackground(CFWL_ThemeBackground* pParams);
+  virtual void DrawText(CFWL_ThemeText* pParams);
   virtual void* GetCapacity(CFWL_ThemePart* pThemePart,
                             CFWL_WidgetCapacity dwCapacity);
-  virtual FX_BOOL IsCustomizedLayout(IFWL_Widget* pWidget);
-  virtual FX_BOOL CalcTextRect(CFWL_ThemeText* pParams, CFX_RectF& rect);
+  virtual bool IsCustomizedLayout(IFWL_Widget* pWidget);
+  virtual void CalcTextRect(CFWL_ThemeText* pParams, CFX_RectF& rect);
 
-  FWL_Error SetFont(IFWL_Widget* pWidget,
-                    const FX_WCHAR* strFont,
-                    FX_FLOAT fFontSize,
-                    FX_ARGB rgbFont);
-  FWL_Error SetFont(IFWL_Widget* pWidget,
-                    CFGAS_GEFont* pFont,
-                    FX_FLOAT fFontSize,
-                    FX_ARGB rgbFont);
+  void SetFont(IFWL_Widget* pWidget,
+               const FX_WCHAR* strFont,
+               FX_FLOAT fFontSize,
+               FX_ARGB rgbFont);
+  void SetFont(IFWL_Widget* pWidget,
+               CFGAS_GEFont* pFont,
+               FX_FLOAT fFontSize,
+               FX_ARGB rgbFont);
   CFGAS_GEFont* GetFont(IFWL_Widget* pWidget);
 
  protected:
   CFWL_WidgetTP();
-  FWL_Error InitTTO();
-  FWL_Error FinalizeTTO();
+
+  void InitTTO();
+  void FinalizeTTO();
+
   void DrawEdge(CFX_Graphics* pGraphics,
                 uint32_t dwStyles,
                 const CFX_RectF* pRect,
@@ -219,7 +219,6 @@ class CFWL_WidgetTP {
   uint32_t m_dwValue;
   CFX_RectF m_rtMargin;
   uint32_t m_dwThemeID;
-  CFX_Matrix _ctm;
 };
 
 void FWLTHEME_Release();