Replace FWL_HLISTITEM with class IFWL_ListItem {}

Make CFWL_ classes inherit from IFWL_ListItem.
Replace reinterpret_casts with static_casts.

Review-Url: https://codereview.chromium.org/2029923002

8 files changed, 356 insertions, 363 deletions

diff --git a/xfa/fwl/basewidget/fwl_comboboximp.cpp b/xfa/fwl/basewidget/fwl_comboboximp.cpp
index 3e70cffffd..34e98fa38a 100644
--- a/xfa/fwl/basewidget/fwl_comboboximp.cpp
+++ b/xfa/fwl/basewidget/fwl_comboboximp.cpp
@@ -223,7 +223,7 @@ int32_t CFWL_ComboListImp::MatchItem(const CFX_WideString& wsMatch) {
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
   int32_t iCount = pData->CountItems(m_pInterface);
   for (int32_t i = 0; i < iCount; i++) {
-    FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, i);
+    IFWL_ListItem* hItem = pData->GetItem(m_pInterface, i);
     CFX_WideString wsText;
     pData->GetItemText(m_pInterface, hItem, wsText);
     FX_STRSIZE pos = wsText.Find(wsMatch.c_str());
@@ -238,10 +238,10 @@ void CFWL_ComboListImp::ChangeSelected(int32_t iSel) {
     return;
   IFWL_ListBoxDP* pData =
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-  FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, iSel);
+  IFWL_ListItem* hItem = pData->GetItem(m_pInterface, iSel);
   CFX_RectF rtInvalidate;
   rtInvalidate.Reset();
-  FWL_HLISTITEM hOld = GetSelItem(0);
+  IFWL_ListItem* hOld = GetSelItem(0);
   int32_t iOld = pData->GetItemIndex(m_pInterface, hOld);
   if (iOld == iSel) {
     return;
@@ -253,7 +253,7 @@ void CFWL_ComboListImp::ChangeSelected(int32_t iSel) {
     CFX_RectF rect;
     GetItemRect(iSel, rect);
     rtInvalidate.Union(rect);
-    FWL_HLISTITEM hSel = pData->GetItem(m_pInterface, iSel);
+    IFWL_ListItem* hSel = pData->GetItem(m_pInterface, iSel);
     SetSelItem(hSel, TRUE);
   }
   if (!rtInvalidate.IsEmpty()) {
@@ -268,7 +268,7 @@ int32_t CFWL_ComboListImp::CountItems() {
 void CFWL_ComboListImp::GetItemRect(int32_t nIndex, CFX_RectF& rtItem) {
   IFWL_ListBoxDP* pData =
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-  FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, nIndex);
+  IFWL_ListItem* hItem = pData->GetItem(m_pInterface, nIndex);
   pData->GetItemRect(m_pInterface, hItem, rtItem);
 }
 void CFWL_ComboListImp::ClientToOuter(FX_FLOAT& fx, FX_FLOAT& fy) {
@@ -358,7 +358,7 @@ int32_t CFWL_ComboListImpDelegate::OnDropListMouseMove(CFWL_MsgMouse* pMsg) {
         return 1;
       }
     }
-    FWL_HLISTITEM hItem = m_pOwner->GetItemAtPoint(pMsg->m_fx, pMsg->m_fy);
+    IFWL_ListItem* hItem = m_pOwner->GetItemAtPoint(pMsg->m_fx, pMsg->m_fy);
     if (hItem) {
       if (!m_pOwner->m_pProperties->m_pDataProvider)
         return 0;
@@ -403,7 +403,7 @@ int32_t CFWL_ComboListImpDelegate::OnDropListLButtonUp(CFWL_MsgMouse* pMsg) {
       }
     }
     pOuter->ShowDropList(FALSE);
-    FWL_HLISTITEM hItem = m_pOwner->GetItemAtPoint(pMsg->m_fx, pMsg->m_fy);
+    IFWL_ListItem* hItem = m_pOwner->GetItemAtPoint(pMsg->m_fx, pMsg->m_fy);
     if (hItem) {
       pOuter->ProcessSelChanged(TRUE);
     }
@@ -452,7 +452,7 @@ void CFWL_ComboListImpDelegate::OnDropListKeyDown(CFWL_MsgKey* pKey) {
           static_cast<CFWL_ComboBoxImp*>(m_pOwner->m_pOuter->GetImpl());
       IFWL_ListBoxDP* pData = static_cast<IFWL_ListBoxDP*>(
           m_pOwner->m_pProperties->m_pDataProvider);
-      FWL_HLISTITEM hItem =
+      IFWL_ListItem* hItem =
           pData->GetItem(m_pOwner->m_pInterface, pOuter->m_iCurSel);
       hItem = m_pOwner->GetItem(hItem, dwKeyCode);
       if (!hItem) {
@@ -657,7 +657,7 @@ FWL_Error CFWL_ComboBoxImp::DrawWidget(CFX_Graphics* pGraphics,
       CFX_WideString wsText;
       IFWL_ComboBoxDP* pData =
           static_cast<IFWL_ComboBoxDP*>(m_pProperties->m_pDataProvider);
-      FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, m_iCurSel);
+      IFWL_ListItem* hItem = pData->GetItem(m_pInterface, m_iCurSel);
       static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())
           ->GetItemText(hItem, wsText);
       CFWL_ThemeText param;
@@ -718,7 +718,7 @@ FWL_Error CFWL_ComboBoxImp::SetCurSel(int32_t iSel) {
       CFX_WideString wsText;
       IFWL_ComboBoxDP* pData =
           static_cast<IFWL_ComboBoxDP*>(m_pProperties->m_pDataProvider);
-      FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, iSel);
+      IFWL_ListItem* hItem = pData->GetItem(m_pInterface, iSel);
       static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())
           ->GetItemText(hItem, wsText);
       m_pEdit->SetText(wsText);
@@ -757,7 +757,7 @@ FWL_Error CFWL_ComboBoxImp::GetEditText(CFX_WideString& wsText,
   } else if (m_pListBox) {
     IFWL_ComboBoxDP* pData =
         static_cast<IFWL_ComboBoxDP*>(m_pProperties->m_pDataProvider);
-    FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, m_iCurSel);
+    IFWL_ListItem* hItem = pData->GetItem(m_pInterface, m_iCurSel);
     return m_pListBox->GetItemText(hItem, wsText);
   }
   return FWL_Error::Indefinite;
@@ -997,7 +997,7 @@ void CFWL_ComboBoxImp::SynchrEditText(int32_t iListItem) {
   CFX_WideString wsText;
   IFWL_ComboBoxDP* pData =
       static_cast<IFWL_ComboBoxDP*>(m_pProperties->m_pDataProvider);
-  FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, iListItem);
+  IFWL_ListItem* hItem = pData->GetItem(m_pInterface, iListItem);
   static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())
       ->GetItemText(hItem, wsText);
   m_pEdit->SetText(wsText);
@@ -1026,7 +1026,7 @@ void CFWL_ComboBoxImp::Layout() {
       CFX_WideString wsText;
       IFWL_ComboBoxDP* pData =
           static_cast<IFWL_ComboBoxDP*>(m_pProperties->m_pDataProvider);
-      FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, m_iCurSel);
+      IFWL_ListItem* hItem = pData->GetItem(m_pInterface, m_iCurSel);
       static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())
           ->GetItemText(hItem, wsText);
       m_pEdit->LockUpdate();
@@ -1115,7 +1115,7 @@ void CFWL_ComboBoxImp::ProcessSelChanged(FX_BOOL bLButtonUp) {
   if (bDropDown) {
     IFWL_ComboBoxDP* pData =
         static_cast<IFWL_ComboBoxDP*>(m_pProperties->m_pDataProvider);
-    FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, m_iCurSel);
+    IFWL_ListItem* hItem = pData->GetItem(m_pInterface, m_iCurSel);
     if (hItem) {
       CFX_WideString wsText;
       pData->GetItemText(m_pInterface, hItem, wsText);
@@ -1357,7 +1357,7 @@ void CFWL_ComboBoxImp::DisForm_Layout() {
       CFX_WideString wsText;
       IFWL_ComboBoxDP* pData =
           static_cast<IFWL_ComboBoxDP*>(m_pProperties->m_pDataProvider);
-      FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, m_iCurSel);
+      IFWL_ListItem* hItem = pData->GetItem(m_pInterface, m_iCurSel);
       static_cast<CFWL_ComboListImp*>(m_pListBox->GetImpl())
           ->GetItemText(hItem, wsText);
       m_pEdit->LockUpdate();
@@ -1570,7 +1570,7 @@ void CFWL_ComboBoxImpDelegate::DoSubCtrlKey(CFWL_MsgKey* pMsg) {
         CFX_WideString wsTemp;
         IFWL_ComboBoxDP* pData = static_cast<IFWL_ComboBoxDP*>(
             m_pOwner->m_pProperties->m_pDataProvider);
-        FWL_HLISTITEM hItem = pData->GetItem(m_pOwner->m_pInterface, iCurSel);
+        IFWL_ListItem* hItem = pData->GetItem(m_pOwner->m_pInterface, iCurSel);
         static_cast<CFWL_ComboListImp*>(m_pOwner->m_pListBox->GetImpl())
             ->GetItemText(hItem, wsTemp);
         bMatchEqual = wsText == wsTemp;
@@ -1721,7 +1721,7 @@ void CFWL_ComboBoxImpDelegate::DisForm_OnKey(CFWL_MsgKey* pMsg) {
       iCurSel = pComboList->MatchItem(wsText);
       if (iCurSel >= 0) {
         CFX_WideString wsTemp;
-        FWL_HLISTITEM item = m_pOwner->m_pListBox->GetSelItem(iCurSel);
+        IFWL_ListItem* item = m_pOwner->m_pListBox->GetSelItem(iCurSel);
         m_pOwner->m_pListBox->GetItemText(item, wsTemp);
         bMatchEqual = wsText == wsTemp;
       }
diff --git a/xfa/fwl/basewidget/fwl_listboximp.cpp b/xfa/fwl/basewidget/fwl_listboximp.cpp
index 9b05a7fee4..639a46c87b 100644
--- a/xfa/fwl/basewidget/fwl_listboximp.cpp
+++ b/xfa/fwl/basewidget/fwl_listboximp.cpp
@@ -46,18 +46,18 @@ IFWL_ListBox::IFWL_ListBox() {}
 int32_t IFWL_ListBox::CountSelItems() {
   return static_cast<CFWL_ListBoxImp*>(GetImpl())->CountSelItems();
 }
-FWL_HLISTITEM IFWL_ListBox::GetSelItem(int32_t nIndexSel) {
+IFWL_ListItem* IFWL_ListBox::GetSelItem(int32_t nIndexSel) {
   return static_cast<CFWL_ListBoxImp*>(GetImpl())->GetSelItem(nIndexSel);
 }
 int32_t IFWL_ListBox::GetSelIndex(int32_t nIndex) {
   return static_cast<CFWL_ListBoxImp*>(GetImpl())->GetSelIndex(nIndex);
 }
-FWL_Error IFWL_ListBox::SetSelItem(FWL_HLISTITEM hItem, FX_BOOL bSelect) {
-  return static_cast<CFWL_ListBoxImp*>(GetImpl())->SetSelItem(hItem, bSelect);
+FWL_Error IFWL_ListBox::SetSelItem(IFWL_ListItem* pItem, FX_BOOL bSelect) {
+  return static_cast<CFWL_ListBoxImp*>(GetImpl())->SetSelItem(pItem, bSelect);
 }
-FWL_Error IFWL_ListBox::GetItemText(FWL_HLISTITEM hItem,
+FWL_Error IFWL_ListBox::GetItemText(IFWL_ListItem* pItem,
                                     CFX_WideString& wsText) {
-  return static_cast<CFWL_ListBoxImp*>(GetImpl())->GetItemText(hItem, wsText);
+  return static_cast<CFWL_ListBoxImp*>(GetImpl())->GetItemText(pItem, wsText);
 }
 FWL_Error IFWL_ListBox::GetScrollPos(FX_FLOAT& fPos, FX_BOOL bVert) {
   return static_cast<CFWL_ListBoxImp*>(GetImpl())->GetScrollPos(fPos, bVert);
@@ -217,18 +217,18 @@ int32_t CFWL_ListBoxImp::CountSelItems() {
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
   int32_t iCount = pData->CountItems(m_pInterface);
   for (int32_t i = 0; i < iCount; i++) {
-    FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, i);
-    if (!hItem) {
+    IFWL_ListItem* pItem = pData->GetItem(m_pInterface, i);
+    if (!pItem) {
       continue;
     }
-    uint32_t dwStyle = pData->GetItemStyles(m_pInterface, hItem);
+    uint32_t dwStyle = pData->GetItemStyles(m_pInterface, pItem);
     if (dwStyle & FWL_ITEMSTATE_LTB_Selected) {
       iRet++;
     }
   }
   return iRet;
 }
-FWL_HLISTITEM CFWL_ListBoxImp::GetSelItem(int32_t nIndexSel) {
+IFWL_ListItem* CFWL_ListBoxImp::GetSelItem(int32_t nIndexSel) {
   if (!m_pProperties->m_pDataProvider)
     return NULL;
   int32_t index = 0;
@@ -236,14 +236,14 @@ FWL_HLISTITEM CFWL_ListBoxImp::GetSelItem(int32_t nIndexSel) {
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
   int32_t iCount = pData->CountItems(m_pInterface);
   for (int32_t i = 0; i < iCount; i++) {
-    FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, i);
-    if (!hItem) {
+    IFWL_ListItem* pItem = pData->GetItem(m_pInterface, i);
+    if (!pItem) {
       return NULL;
     }
-    uint32_t dwStyle = pData->GetItemStyles(m_pInterface, hItem);
+    uint32_t dwStyle = pData->GetItemStyles(m_pInterface, pItem);
     if (dwStyle & FWL_ITEMSTATE_LTB_Selected) {
       if (index == nIndexSel) {
-        return hItem;
+        return pItem;
       } else {
         index++;
       }
@@ -259,11 +259,11 @@ int32_t CFWL_ListBoxImp::GetSelIndex(int32_t nIndex) {
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
   int32_t iCount = pData->CountItems(m_pInterface);
   for (int32_t i = 0; i < iCount; i++) {
-    FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, i);
-    if (!hItem) {
+    IFWL_ListItem* pItem = pData->GetItem(m_pInterface, i);
+    if (!pItem) {
       return -1;
     }
-    uint32_t dwStyle = pData->GetItemStyles(m_pInterface, hItem);
+    uint32_t dwStyle = pData->GetItemStyles(m_pInterface, pItem);
     if (dwStyle & FWL_ITEMSTATE_LTB_Selected) {
       if (index == nIndex) {
         return i;
@@ -274,10 +274,10 @@ int32_t CFWL_ListBoxImp::GetSelIndex(int32_t nIndex) {
   }
   return -1;
 }
-FWL_Error CFWL_ListBoxImp::SetSelItem(FWL_HLISTITEM hItem, FX_BOOL bSelect) {
+FWL_Error CFWL_ListBoxImp::SetSelItem(IFWL_ListItem* pItem, FX_BOOL bSelect) {
   if (!m_pProperties->m_pDataProvider)
     return FWL_Error::Indefinite;
-  if (!hItem) {
+  if (!pItem) {
     if (bSelect) {
       SelectAll();
     } else {
@@ -287,21 +287,21 @@ FWL_Error CFWL_ListBoxImp::SetSelItem(FWL_HLISTITEM hItem, FX_BOOL bSelect) {
     return FWL_Error::Indefinite;
   }
   if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_MultiSelection) {
-    SetSelectionDirect(hItem, bSelect);
+    SetSelectionDirect(pItem, bSelect);
   } else {
-    SetSelection(hItem, hItem, bSelect);
+    SetSelection(pItem, pItem, bSelect);
   }
   return FWL_Error::Succeeded;
 }
-FWL_Error CFWL_ListBoxImp::GetItemText(FWL_HLISTITEM hItem,
+FWL_Error CFWL_ListBoxImp::GetItemText(IFWL_ListItem* pItem,
                                        CFX_WideString& wsText) {
   if (!m_pProperties->m_pDataProvider)
     return FWL_Error::Indefinite;
   IFWL_ListBoxDP* pData =
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-  if (!hItem)
+  if (!pItem)
     return FWL_Error::Indefinite;
-  pData->GetItemText(m_pInterface, hItem, wsText);
+  pData->GetItemText(m_pInterface, pItem, wsText);
   return FWL_Error::Succeeded;
 }
 
@@ -315,9 +315,9 @@ FWL_Error CFWL_ListBoxImp::GetScrollPos(FX_FLOAT& fPos, FX_BOOL bVert) {
   return FWL_Error::Indefinite;
 }
 
-FWL_HLISTITEM CFWL_ListBoxImp::GetItem(FWL_HLISTITEM hItem,
-                                       uint32_t dwKeyCode) {
-  FWL_HLISTITEM hRet = NULL;
+IFWL_ListItem* CFWL_ListBoxImp::GetItem(IFWL_ListItem* pItem,
+                                        uint32_t dwKeyCode) {
+  IFWL_ListItem* hRet = NULL;
   switch (dwKeyCode) {
     case FWL_VKEY_Up:
     case FWL_VKEY_Down:
@@ -330,7 +330,7 @@ FWL_HLISTITEM CFWL_ListBoxImp::GetItem(FWL_HLISTITEM hItem,
           static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
       int32_t iDstItem = -1;
       if (bUp || bDown) {
-        int32_t index = pData->GetItemIndex(m_pInterface, hItem);
+        int32_t index = pData->GetItemIndex(m_pInterface, pItem);
         iDstItem = dwKeyCode == FWL_VKEY_Up ? index - 1 : index + 1;
       } else if (bHome) {
         iDstItem = 0;
@@ -345,8 +345,8 @@ FWL_HLISTITEM CFWL_ListBoxImp::GetItem(FWL_HLISTITEM hItem,
   }
   return hRet;
 }
-void CFWL_ListBoxImp::SetSelection(FWL_HLISTITEM hStart,
-                                   FWL_HLISTITEM hEnd,
+void CFWL_ListBoxImp::SetSelection(IFWL_ListItem* hStart,
+                                   IFWL_ListItem* hEnd,
                                    FX_BOOL bSelected) {
   IFWL_ListBoxDP* pData =
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
@@ -360,27 +360,28 @@ void CFWL_ListBoxImp::SetSelection(FWL_HLISTITEM hStart,
   if (bSelected) {
     int32_t iCount = pData->CountItems(m_pInterface);
     for (int32_t i = 0; i < iCount; i++) {
-      FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, i);
-      SetSelectionDirect(hItem, FALSE);
+      IFWL_ListItem* pItem = pData->GetItem(m_pInterface, i);
+      SetSelectionDirect(pItem, FALSE);
     }
   }
   for (; iStart <= iEnd; iStart++) {
-    FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, iStart);
-    SetSelectionDirect(hItem, bSelected);
+    IFWL_ListItem* pItem = pData->GetItem(m_pInterface, iStart);
+    SetSelectionDirect(pItem, bSelected);
   }
 }
-void CFWL_ListBoxImp::SetSelectionDirect(FWL_HLISTITEM hItem, FX_BOOL bSelect) {
+void CFWL_ListBoxImp::SetSelectionDirect(IFWL_ListItem* pItem,
+                                         FX_BOOL bSelect) {
   IFWL_ListBoxDP* pData =
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-  uint32_t dwOldStyle = pData->GetItemStyles(m_pInterface, hItem);
+  uint32_t dwOldStyle = pData->GetItemStyles(m_pInterface, pItem);
   bSelect ? dwOldStyle |= FWL_ITEMSTATE_LTB_Selected
           : dwOldStyle &= ~FWL_ITEMSTATE_LTB_Selected;
-  pData->SetItemStyles(m_pInterface, hItem, dwOldStyle);
+  pData->SetItemStyles(m_pInterface, pItem, dwOldStyle);
 }
-FX_BOOL CFWL_ListBoxImp::IsItemSelected(FWL_HLISTITEM hItem) {
+FX_BOOL CFWL_ListBoxImp::IsItemSelected(IFWL_ListItem* pItem) {
   IFWL_ListBoxDP* pData =
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-  uint32_t dwState = pData->GetItemStyles(m_pInterface, hItem);
+  uint32_t dwState = pData->GetItemStyles(m_pInterface, pItem);
   return (dwState & FWL_ITEMSTATE_LTB_Selected) != 0;
 }
 void CFWL_ListBoxImp::ClearSelection() {
@@ -390,11 +391,11 @@ void CFWL_ListBoxImp::ClearSelection() {
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
   int32_t iCount = pData->CountItems(m_pInterface);
   for (int32_t i = 0; i < iCount; i++) {
-    FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, i);
-    uint32_t dwState = pData->GetItemStyles(m_pInterface, hItem);
+    IFWL_ListItem* pItem = pData->GetItem(m_pInterface, i);
+    uint32_t dwState = pData->GetItemStyles(m_pInterface, pItem);
     if (!(dwState & FWL_ITEMSTATE_LTB_Selected))
       continue;
-    SetSelectionDirect(hItem, FALSE);
+    SetSelectionDirect(pItem, FALSE);
     if (!bMulti)
       return;
   }
@@ -409,43 +410,43 @@ void CFWL_ListBoxImp::SelectAll() {
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
   int32_t iCount = pData->CountItems(m_pInterface);
   if (iCount > 0) {
-    FWL_HLISTITEM hItemStart = pData->GetItem(m_pInterface, 0);
-    FWL_HLISTITEM hItemEnd = pData->GetItem(m_pInterface, iCount - 1);
-    SetSelection(hItemStart, hItemEnd, FALSE);
+    IFWL_ListItem* pItemStart = pData->GetItem(m_pInterface, 0);
+    IFWL_ListItem* pItemEnd = pData->GetItem(m_pInterface, iCount - 1);
+    SetSelection(pItemStart, pItemEnd, FALSE);
   }
 }
-FWL_HLISTITEM CFWL_ListBoxImp::GetFocusedItem() {
+IFWL_ListItem* CFWL_ListBoxImp::GetFocusedItem() {
   IFWL_ListBoxDP* pData =
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
   int32_t iCount = pData->CountItems(m_pInterface);
   for (int32_t i = 0; i < iCount; i++) {
-    FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, i);
-    if (!hItem)
+    IFWL_ListItem* pItem = pData->GetItem(m_pInterface, i);
+    if (!pItem)
       return NULL;
-    if (pData->GetItemStyles(m_pInterface, hItem) & FWL_ITEMSTATE_LTB_Focused) {
-      return hItem;
+    if (pData->GetItemStyles(m_pInterface, pItem) & FWL_ITEMSTATE_LTB_Focused) {
+      return pItem;
     }
   }
   return NULL;
 }
-void CFWL_ListBoxImp::SetFocusItem(FWL_HLISTITEM hItem) {
+void CFWL_ListBoxImp::SetFocusItem(IFWL_ListItem* pItem) {
   IFWL_ListBoxDP* pData =
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-  FWL_HLISTITEM hFocus = GetFocusedItem();
-  if (hItem != hFocus) {
+  IFWL_ListItem* hFocus = GetFocusedItem();
+  if (pItem != hFocus) {
     if (hFocus) {
       uint32_t dwStyle = pData->GetItemStyles(m_pInterface, hFocus);
       dwStyle &= ~FWL_ITEMSTATE_LTB_Focused;
       pData->SetItemStyles(m_pInterface, hFocus, dwStyle);
     }
-    if (hItem) {
-      uint32_t dwStyle = pData->GetItemStyles(m_pInterface, hItem);
+    if (pItem) {
+      uint32_t dwStyle = pData->GetItemStyles(m_pInterface, pItem);
       dwStyle |= FWL_ITEMSTATE_LTB_Focused;
-      pData->SetItemStyles(m_pInterface, hItem, dwStyle);
+      pData->SetItemStyles(m_pInterface, pItem, dwStyle);
     }
   }
 }
-FWL_HLISTITEM CFWL_ListBoxImp::GetItemAtPoint(FX_FLOAT fx, FX_FLOAT fy) {
+IFWL_ListItem* CFWL_ListBoxImp::GetItemAtPoint(FX_FLOAT fx, FX_FLOAT fy) {
   fx -= m_rtConent.left, fy -= m_rtConent.top;
   FX_FLOAT fPosX = 0.0f;
   if (m_pHorzScrollBar) {
@@ -459,20 +460,20 @@ FWL_HLISTITEM CFWL_ListBoxImp::GetItemAtPoint(FX_FLOAT fx, FX_FLOAT fy) {
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
   int32_t nCount = pData->CountItems(m_pInterface);
   for (int32_t i = 0; i < nCount; i++) {
-    FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, i);
-    if (!hItem) {
+    IFWL_ListItem* pItem = pData->GetItem(m_pInterface, i);
+    if (!pItem) {
       continue;
     }
     CFX_RectF rtItem;
-    pData->GetItemRect(m_pInterface, hItem, rtItem);
+    pData->GetItemRect(m_pInterface, pItem, rtItem);
     rtItem.Offset(-fPosX, -fPosY);
     if (rtItem.Contains(fx, fy)) {
-      return hItem;
+      return pItem;
     }
   }
   return NULL;
 }
-FX_BOOL CFWL_ListBoxImp::GetItemCheckRect(FWL_HLISTITEM hItem,
+FX_BOOL CFWL_ListBoxImp::GetItemCheckRect(IFWL_ListItem* pItem,
                                           CFX_RectF& rtCheck) {
   if (!m_pProperties->m_pDataProvider)
     return FALSE;
@@ -481,10 +482,10 @@ FX_BOOL CFWL_ListBoxImp::GetItemCheckRect(FWL_HLISTITEM hItem,
   }
   IFWL_ListBoxDP* pData =
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-  pData->GetItemCheckRect(m_pInterface, hItem, rtCheck);
+  pData->GetItemCheckRect(m_pInterface, pItem, rtCheck);
   return TRUE;
 }
-FX_BOOL CFWL_ListBoxImp::GetItemChecked(FWL_HLISTITEM hItem) {
+FX_BOOL CFWL_ListBoxImp::GetItemChecked(IFWL_ListItem* pItem) {
   if (!m_pProperties->m_pDataProvider)
     return FALSE;
   if (!(m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_Check)) {
@@ -492,10 +493,11 @@ FX_BOOL CFWL_ListBoxImp::GetItemChecked(FWL_HLISTITEM hItem) {
   }
   IFWL_ListBoxDP* pData =
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-  return (pData->GetItemCheckState(m_pInterface, hItem) &
+  return (pData->GetItemCheckState(m_pInterface, pItem) &
           FWL_ITEMSTATE_LTB_Checked);
 }
-FX_BOOL CFWL_ListBoxImp::SetItemChecked(FWL_HLISTITEM hItem, FX_BOOL bChecked) {
+FX_BOOL CFWL_ListBoxImp::SetItemChecked(IFWL_ListItem* pItem,
+                                        FX_BOOL bChecked) {
   if (!m_pProperties->m_pDataProvider)
     return FALSE;
   if (!(m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_Check)) {
@@ -503,17 +505,17 @@ FX_BOOL CFWL_ListBoxImp::SetItemChecked(FWL_HLISTITEM hItem, FX_BOOL bChecked) {
   }
   IFWL_ListBoxDP* pData =
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-  pData->SetItemCheckState(m_pInterface, hItem,
+  pData->SetItemCheckState(m_pInterface, pItem,
                            bChecked ? FWL_ITEMSTATE_LTB_Checked : 0);
   return TRUE;
 }
-FX_BOOL CFWL_ListBoxImp::ScrollToVisible(FWL_HLISTITEM hItem) {
+FX_BOOL CFWL_ListBoxImp::ScrollToVisible(IFWL_ListItem* pItem) {
   if (!m_pVertScrollBar)
     return FALSE;
   CFX_RectF rtItem;
   IFWL_ListBoxDP* pData =
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-  pData->GetItemRect(m_pInterface, hItem, rtItem);
+  pData->GetItemRect(m_pInterface, pItem, rtItem);
   FX_BOOL bScroll = FALSE;
   FX_FLOAT fPosY = m_pVertScrollBar->GetPos();
   rtItem.Offset(0, -fPosY + m_rtConent.top);
@@ -578,12 +580,12 @@ void CFWL_ListBoxImp::DrawItems(CFX_Graphics* pGraphics,
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
   int32_t iCount = pData->CountItems(m_pInterface);
   for (int32_t i = 0; i < iCount; i++) {
-    FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, i);
-    if (!hItem) {
+    IFWL_ListItem* pItem = pData->GetItem(m_pInterface, i);
+    if (!pItem) {
       continue;
     }
     CFX_RectF rtItem;
-    pData->GetItemRect(m_pInterface, hItem, rtItem);
+    pData->GetItemRect(m_pInterface, pItem, rtItem);
     rtItem.Offset(m_rtConent.left - fPosX, m_rtConent.top - fPosY);
     if (rtItem.bottom() < m_rtConent.top) {
       continue;
@@ -603,19 +605,19 @@ void CFWL_ListBoxImp::DrawItems(CFX_Graphics* pGraphics,
       ev.m_rect = rtItem;
       DispatchEvent(&ev);
     } else {
-      DrawItem(pGraphics, pTheme, hItem, i, rtItem, pMatrix);
+      DrawItem(pGraphics, pTheme, pItem, i, rtItem, pMatrix);
     }
   }
 }
 void CFWL_ListBoxImp::DrawItem(CFX_Graphics* pGraphics,
                                IFWL_ThemeProvider* pTheme,
-                               FWL_HLISTITEM hItem,
+                               IFWL_ListItem* pItem,
                                int32_t Index,
                                const CFX_RectF& rtItem,
                                const CFX_Matrix* pMatrix) {
   IFWL_ListBoxDP* pData =
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-  uint32_t dwItemStyles = pData->GetItemStyles(m_pInterface, hItem);
+  uint32_t dwItemStyles = pData->GetItemStyles(m_pInterface, pItem);
   uint32_t dwPartStates = CFWL_PartState_Normal;
   if (m_pProperties->m_dwStates & FWL_WGTSTATE_Disabled) {
     dwPartStates = CFWL_PartState_Disabled;
@@ -649,7 +651,7 @@ void CFWL_ListBoxImp::DrawItem(CFX_Graphics* pGraphics,
     FX_BOOL bHasIcon = GetStylesEx() & FWL_STYLEEXT_LTB_Icon;
     if (bHasIcon) {
       CFX_RectF rtDIB;
-      CFX_DIBitmap* pDib = pData->GetItemIcon(m_pInterface, hItem);
+      CFX_DIBitmap* pDib = pData->GetItemIcon(m_pInterface, pItem);
       rtDIB.Set(rtItem.left, rtItem.top, rtItem.height, rtItem.height);
       if (pDib) {
         CFWL_ThemeBackground param;
@@ -668,12 +670,12 @@ void CFWL_ListBoxImp::DrawItem(CFX_Graphics* pGraphics,
       CFX_RectF rtCheck;
       rtCheck.Set(rtItem.left, rtItem.top, rtItem.height, rtItem.height);
       rtCheck.Deflate(2, 2, 2, 2);
-      pData->SetItemCheckRect(m_pInterface, hItem, rtCheck);
+      pData->SetItemCheckRect(m_pInterface, pItem, rtCheck);
       CFWL_ThemeBackground param;
       param.m_pWidget = m_pInterface;
       param.m_iPart = CFWL_Part::Check;
       param.m_pGraphics = pGraphics;
-      if (GetItemChecked(hItem)) {
+      if (GetItemChecked(pItem)) {
         param.m_dwStates = CFWL_PartState_Checked;
       } else {
         param.m_dwStates = CFWL_PartState_Normal;
@@ -684,7 +686,7 @@ void CFWL_ListBoxImp::DrawItem(CFX_Graphics* pGraphics,
       pTheme->DrawBackground(&param);
     }
     CFX_WideString wsText;
-    pData->GetItemText(m_pInterface, hItem, wsText);
+    pData->GetItemText(m_pInterface, pItem, wsText);
     if (wsText.GetLength() <= 0) {
       return;
     }
@@ -728,11 +730,9 @@ CFX_SizeF CFWL_ListBoxImp::CalcSize(FX_BOOL bAutoSize) {
   if (m_pProperties->m_pThemeProvider->IsCustomizedLayout(m_pInterface)) {
     IFWL_ListBoxDP* pData =
         static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-    if (!bAutoSize) {
-    }
     int32_t iCount = pData->CountItems(m_pInterface);
     for (int32_t i = 0; i < iCount; i++) {
-      FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, i);
+      IFWL_ListItem* pItem = pData->GetItem(m_pInterface, i);
       CFWL_ThemePart itemPart;
       itemPart.m_pWidget = m_pInterface;
       itemPart.m_iPart = CFWL_Part::ListItem;
@@ -745,7 +745,7 @@ CFX_SizeF CFWL_ListBoxImp::CalcSize(FX_BOOL bAutoSize) {
         rtItem.Set(m_rtClient.left, m_rtClient.top + fs.y, r.width, r.height);
         IFWL_ListBoxDP* pData =
             static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-        pData->SetItemRect(m_pInterface, hItem, rtItem);
+        pData->SetItemRect(m_pInterface, pItem, rtItem);
       }
       fs.y += r.height;
       if (fs.x < r.width) {
@@ -773,7 +773,7 @@ CFX_SizeF CFWL_ListBoxImp::CalcSize(FX_BOOL bAutoSize) {
     }
     int32_t iCount = pData->CountItems(m_pInterface);
     for (int32_t i = 0; i < iCount; i++) {
-      FWL_HLISTITEM htem = pData->GetItem(m_pInterface, i);
+      IFWL_ListItem* htem = pData->GetItem(m_pInterface, i);
       GetItemSize(fs, htem, fWidth, m_fItemHeight, bAutoSize);
     }
   }
@@ -877,7 +877,7 @@ CFX_SizeF CFWL_ListBoxImp::CalcSize(FX_BOOL bAutoSize) {
   return fs;
 }
 void CFWL_ListBoxImp::GetItemSize(CFX_SizeF& size,
-                                  FWL_HLISTITEM hItem,
+                                  IFWL_ListItem* pItem,
                                   FX_FLOAT fWidth,
                                   FX_FLOAT m_fItemHeight,
                                   FX_BOOL bAutoSize) {
@@ -888,7 +888,7 @@ void CFWL_ListBoxImp::GetItemSize(CFX_SizeF& size,
       rtItem.Set(0, size.y, fWidth, m_fItemHeight);
       IFWL_ListBoxDP* pData =
           static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-      pData->SetItemRect(m_pInterface, hItem, rtItem);
+      pData->SetItemRect(m_pInterface, pItem, rtItem);
     }
     size.x = fWidth;
     size.y += m_fItemHeight;
@@ -900,12 +900,12 @@ FX_FLOAT CFWL_ListBoxImp::GetMaxTextWidth() {
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
   int32_t iCount = pData->CountItems(m_pInterface);
   for (int32_t i = 0; i < iCount; i++) {
-    FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, i);
-    if (!hItem) {
+    IFWL_ListItem* pItem = pData->GetItem(m_pInterface, i);
+    if (!pItem) {
       continue;
     }
     CFX_WideString wsText;
-    pData->GetItemText(m_pInterface, hItem, wsText);
+    pData->GetItemText(m_pInterface, pItem, wsText);
     CFX_SizeF sz = CalcTextSize(wsText, m_pProperties->m_pThemeProvider);
     if (sz.x > fRet) {
       fRet = sz.x;
@@ -957,7 +957,7 @@ void CFWL_ListBoxImp::ProcessSelChanged() {
   CFX_Int32Array arrSels;
   int32_t iCount = CountSelItems();
   for (int32_t i = 0; i < iCount; i++) {
-    FWL_HLISTITEM item = GetSelItem(i);
+    IFWL_ListItem* item = GetSelItem(i);
     if (item == NULL) {
       continue;
     }
@@ -1061,46 +1061,46 @@ void CFWL_ListBoxImpDelegate::OnLButtonDown(CFWL_MsgMouse* pMsg) {
   if ((m_pOwner->m_pProperties->m_dwStates & FWL_WGTSTATE_Focused) == 0) {
     m_pOwner->SetFocus(TRUE);
   }
-  FWL_HLISTITEM hItem = m_pOwner->GetItemAtPoint(pMsg->m_fx, pMsg->m_fy);
-  if (!hItem) {
+  IFWL_ListItem* pItem = m_pOwner->GetItemAtPoint(pMsg->m_fx, pMsg->m_fy);
+  if (!pItem) {
     return;
   }
   if (m_pOwner->m_pProperties->m_dwStyleExes &
       FWL_STYLEEXT_LTB_MultiSelection) {
     if (pMsg->m_dwFlags & FWL_KEYFLAG_Ctrl) {
-      FX_BOOL bSelected = m_pOwner->IsItemSelected(hItem);
-      m_pOwner->SetSelectionDirect(hItem, !bSelected);
-      m_pOwner->m_hAnchor = hItem;
+      FX_BOOL bSelected = m_pOwner->IsItemSelected(pItem);
+      m_pOwner->SetSelectionDirect(pItem, !bSelected);
+      m_pOwner->m_hAnchor = pItem;
     } else if (pMsg->m_dwFlags & FWL_KEYFLAG_Shift) {
       if (m_pOwner->m_hAnchor) {
-        m_pOwner->SetSelection(m_pOwner->m_hAnchor, hItem, TRUE);
+        m_pOwner->SetSelection(m_pOwner->m_hAnchor, pItem, TRUE);
       } else {
-        m_pOwner->SetSelectionDirect(hItem, TRUE);
+        m_pOwner->SetSelectionDirect(pItem, TRUE);
       }
     } else {
-      m_pOwner->SetSelection(hItem, hItem, TRUE);
-      m_pOwner->m_hAnchor = hItem;
+      m_pOwner->SetSelection(pItem, pItem, TRUE);
+      m_pOwner->m_hAnchor = pItem;
     }
   } else {
-    m_pOwner->SetSelection(hItem, hItem, TRUE);
+    m_pOwner->SetSelection(pItem, pItem, TRUE);
   }
   if (m_pOwner->m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_Check) {
-    FWL_HLISTITEM hSelectedItem =
+    IFWL_ListItem* hSelectedItem =
         m_pOwner->GetItemAtPoint(pMsg->m_fx, pMsg->m_fy);
     CFX_RectF rtCheck;
     m_pOwner->GetItemCheckRect(hSelectedItem, rtCheck);
-    FX_BOOL bChecked = m_pOwner->GetItemChecked(hItem);
+    FX_BOOL bChecked = m_pOwner->GetItemChecked(pItem);
     if (rtCheck.Contains(pMsg->m_fx, pMsg->m_fy)) {
       if (bChecked) {
-        m_pOwner->SetItemChecked(hItem, FALSE);
+        m_pOwner->SetItemChecked(pItem, FALSE);
       } else {
-        m_pOwner->SetItemChecked(hItem, TRUE);
+        m_pOwner->SetItemChecked(pItem, TRUE);
       }
       m_pOwner->Update();
     }
   }
-  m_pOwner->SetFocusItem(hItem);
-  m_pOwner->ScrollToVisible(hItem);
+  m_pOwner->SetFocusItem(pItem);
+  m_pOwner->ScrollToVisible(pItem);
   m_pOwner->SetGrab(TRUE);
   m_pOwner->ProcessSelChanged();
   m_pOwner->Repaint(&m_pOwner->m_rtClient);
@@ -1128,11 +1128,11 @@ void CFWL_ListBoxImpDelegate::OnKeyDown(CFWL_MsgKey* pMsg) {
     case FWL_VKEY_Down:
     case FWL_VKEY_Home:
     case FWL_VKEY_End: {
-      FWL_HLISTITEM hItem = m_pOwner->GetFocusedItem();
-      hItem = m_pOwner->GetItem(hItem, dwKeyCode);
+      IFWL_ListItem* pItem = m_pOwner->GetFocusedItem();
+      pItem = m_pOwner->GetItem(pItem, dwKeyCode);
       FX_BOOL bShift = pMsg->m_dwFlags & FWL_KEYFLAG_Shift;
       FX_BOOL bCtrl = pMsg->m_dwFlags & FWL_KEYFLAG_Ctrl;
-      OnVK(hItem, bShift, bCtrl);
+      OnVK(pItem, bShift, bCtrl);
       DispatchSelChangedEv();
       m_pOwner->ProcessSelChanged();
       break;
@@ -1140,10 +1140,10 @@ void CFWL_ListBoxImpDelegate::OnKeyDown(CFWL_MsgKey* pMsg) {
     default: {}
   }
 }
-void CFWL_ListBoxImpDelegate::OnVK(FWL_HLISTITEM hItem,
+void CFWL_ListBoxImpDelegate::OnVK(IFWL_ListItem* pItem,
                                    FX_BOOL bShift,
                                    FX_BOOL bCtrl) {
-  if (!hItem) {
+  if (!pItem) {
     return;
   }
   if (m_pOwner->m_pProperties->m_dwStyleExes &
@@ -1151,19 +1151,19 @@ void CFWL_ListBoxImpDelegate::OnVK(FWL_HLISTITEM hItem,
     if (bCtrl) {
     } else if (bShift) {
       if (m_pOwner->m_hAnchor) {
-        m_pOwner->SetSelection(m_pOwner->m_hAnchor, hItem, TRUE);
+        m_pOwner->SetSelection(m_pOwner->m_hAnchor, pItem, TRUE);
       } else {
-        m_pOwner->SetSelectionDirect(hItem, TRUE);
+        m_pOwner->SetSelectionDirect(pItem, TRUE);
       }
     } else {
-      m_pOwner->SetSelection(hItem, hItem, TRUE);
-      m_pOwner->m_hAnchor = hItem;
+      m_pOwner->SetSelection(pItem, pItem, TRUE);
+      m_pOwner->m_hAnchor = pItem;
     }
   } else {
-    m_pOwner->SetSelection(hItem, hItem, TRUE);
+    m_pOwner->SetSelection(pItem, pItem, TRUE);
   }
-  m_pOwner->SetFocusItem(hItem);
-  m_pOwner->ScrollToVisible(hItem);
+  m_pOwner->SetFocusItem(pItem);
+  m_pOwner->ScrollToVisible(pItem);
   {
     CFX_RectF rtInvalidate;
     rtInvalidate.Set(0, 0, m_pOwner->m_pProperties->m_rtWidget.width,
diff --git a/xfa/fwl/basewidget/fwl_listboximp.h b/xfa/fwl/basewidget/fwl_listboximp.h
index f32dece8dc..1a7a9419e5 100644
--- a/xfa/fwl/basewidget/fwl_listboximp.h
+++ b/xfa/fwl/basewidget/fwl_listboximp.h
@@ -39,31 +39,31 @@ class CFWL_ListBoxImp : public CFWL_WidgetImp {
   FWL_Error SetThemeProvider(IFWL_ThemeProvider* pThemeProvider) override;
 
   int32_t CountSelItems();
-  FWL_HLISTITEM GetSelItem(int32_t nIndexSel);
+  IFWL_ListItem* GetSelItem(int32_t nIndexSel);
   int32_t GetSelIndex(int32_t nIndex);
-  FWL_Error SetSelItem(FWL_HLISTITEM hItem, FX_BOOL bSelect = TRUE);
-  FWL_Error GetItemText(FWL_HLISTITEM hItem, CFX_WideString& wsText);
+  FWL_Error SetSelItem(IFWL_ListItem* hItem, FX_BOOL bSelect = TRUE);
+  FWL_Error GetItemText(IFWL_ListItem* hItem, CFX_WideString& wsText);
   FWL_Error GetScrollPos(FX_FLOAT& fPos, FX_BOOL bVert = TRUE);
   FWL_Error* Sort(IFWL_ListBoxCompare* pCom);
 
  protected:
   friend class CFWL_ListBoxImpDelegate;
 
-  FWL_HLISTITEM GetItem(FWL_HLISTITEM hItem, uint32_t dwKeyCode);
-  void SetSelection(FWL_HLISTITEM hStart,
-                    FWL_HLISTITEM hEnd,
+  IFWL_ListItem* GetItem(IFWL_ListItem* hItem, uint32_t dwKeyCode);
+  void SetSelection(IFWL_ListItem* hStart,
+                    IFWL_ListItem* hEnd,
                     FX_BOOL bSelected);
-  void SetSelectionDirect(FWL_HLISTITEM hItem, FX_BOOL bSelect);
-  FX_BOOL IsItemSelected(FWL_HLISTITEM hItem);
+  void SetSelectionDirect(IFWL_ListItem* hItem, FX_BOOL bSelect);
+  FX_BOOL IsItemSelected(IFWL_ListItem* hItem);
   void ClearSelection();
   void SelectAll();
-  FWL_HLISTITEM GetFocusedItem();
-  void SetFocusItem(FWL_HLISTITEM hItem);
-  FWL_HLISTITEM GetItemAtPoint(FX_FLOAT fx, FX_FLOAT fy);
-  FX_BOOL GetItemCheckRect(FWL_HLISTITEM hItem, CFX_RectF& rtCheck);
-  FX_BOOL SetItemChecked(FWL_HLISTITEM hItem, FX_BOOL bChecked);
-  FX_BOOL GetItemChecked(FWL_HLISTITEM hItem);
-  FX_BOOL ScrollToVisible(FWL_HLISTITEM hItem);
+  IFWL_ListItem* GetFocusedItem();
+  void SetFocusItem(IFWL_ListItem* hItem);
+  IFWL_ListItem* GetItemAtPoint(FX_FLOAT fx, FX_FLOAT fy);
+  FX_BOOL GetItemCheckRect(IFWL_ListItem* hItem, CFX_RectF& rtCheck);
+  FX_BOOL SetItemChecked(IFWL_ListItem* hItem, FX_BOOL bChecked);
+  FX_BOOL GetItemChecked(IFWL_ListItem* hItem);
+  FX_BOOL ScrollToVisible(IFWL_ListItem* hItem);
   void DrawBkground(CFX_Graphics* pGraphics,
                     IFWL_ThemeProvider* pTheme,
                     const CFX_Matrix* pMatrix = NULL);
@@ -72,14 +72,14 @@ class CFWL_ListBoxImp : public CFWL_WidgetImp {
                  const CFX_Matrix* pMatrix = NULL);
   void DrawItem(CFX_Graphics* pGraphics,
                 IFWL_ThemeProvider* pTheme,
-                FWL_HLISTITEM hItem,
+                IFWL_ListItem* hItem,
                 int32_t Index,
                 const CFX_RectF& rtItem,
                 const CFX_Matrix* pMatrix = NULL);
   void DrawStatic(CFX_Graphics* pGraphics, IFWL_ThemeProvider* pTheme);
   CFX_SizeF CalcSize(FX_BOOL bAutoSize = FALSE);
   void GetItemSize(CFX_SizeF& size,
-                   FWL_HLISTITEM hItem,
+                   IFWL_ListItem* hItem,
                    FX_FLOAT fWidth,
                    FX_FLOAT fHeight,
                    FX_BOOL bAutoSize = FALSE);
@@ -97,7 +97,7 @@ class CFWL_ListBoxImp : public CFWL_WidgetImp {
   std::unique_ptr<IFWL_ScrollBar> m_pVertScrollBar;
   uint32_t m_dwTTOStyles;
   int32_t m_iTTOAligns;
-  FWL_HLISTITEM m_hAnchor;
+  IFWL_ListItem* m_hAnchor;
   FX_FLOAT m_fItemHeight;
   FX_FLOAT m_fScorllBarWidth;
   FX_BOOL m_bLButtonDown;
@@ -117,7 +117,7 @@ class CFWL_ListBoxImpDelegate : public CFWL_WidgetImpDelegate {
   void OnLButtonUp(CFWL_MsgMouse* pMsg);
   void OnMouseWheel(CFWL_MsgMouseWheel* pMsg);
   void OnKeyDown(CFWL_MsgKey* pMsg);
-  void OnVK(FWL_HLISTITEM hItem, FX_BOOL bShift, FX_BOOL bCtrl);
+  void OnVK(IFWL_ListItem* hItem, FX_BOOL bShift, FX_BOOL bCtrl);
   FX_BOOL OnScroll(IFWL_ScrollBar* pScrollBar, uint32_t dwCode, FX_FLOAT fPos);
   void DispatchSelChangedEv();
   CFWL_ListBoxImp* m_pOwner;
diff --git a/xfa/fwl/basewidget/ifwl_listbox.h b/xfa/fwl/basewidget/ifwl_listbox.h
index 9782cbbc29..c531cea9f3 100644
--- a/xfa/fwl/basewidget/ifwl_listbox.h
+++ b/xfa/fwl/basewidget/ifwl_listbox.h
@@ -29,8 +29,6 @@
 #define FWL_ITEMSTATE_LTB_Focused (1L << 1)
 #define FWL_ITEMSTATE_LTB_Checked (1L << 2)
 
-typedef struct FWL_HLISTITEM_ { void* pData; } * FWL_HLISTITEM;
-
 class CFX_DIBitmap;
 
 BEGIN_FWL_EVENT_DEF(CFWL_EvtLtbSelChanged, CFWL_EventType::SelectChanged)
@@ -44,51 +42,54 @@ int32_t m_index;
 CFX_RectF m_rect;
 END_FWL_EVENT_DEF
 
+class IFWL_ListItem {};
+
 class IFWL_ListBoxDP : public IFWL_DataProvider {
  public:
   virtual int32_t CountItems(IFWL_Widget* pWidget) = 0;
-  virtual FWL_HLISTITEM GetItem(IFWL_Widget* pWidget, int32_t nIndex) = 0;
-  virtual int32_t GetItemIndex(IFWL_Widget* pWidget, FWL_HLISTITEM hItem) = 0;
+  virtual IFWL_ListItem* GetItem(IFWL_Widget* pWidget, int32_t nIndex) = 0;
+  virtual int32_t GetItemIndex(IFWL_Widget* pWidget, IFWL_ListItem* pItem) = 0;
   virtual FX_BOOL SetItemIndex(IFWL_Widget* pWidget,
-                               FWL_HLISTITEM hItem,
+                               IFWL_ListItem* pItem,
                                int32_t nIndex) = 0;
-  virtual uint32_t GetItemStyles(IFWL_Widget* pWidget, FWL_HLISTITEM hItem) = 0;
+  virtual uint32_t GetItemStyles(IFWL_Widget* pWidget,
+                                 IFWL_ListItem* pItem) = 0;
   virtual FWL_Error GetItemText(IFWL_Widget* pWidget,
-                                FWL_HLISTITEM hItem,
+                                IFWL_ListItem* pItem,
                                 CFX_WideString& wsText) = 0;
   virtual FWL_Error GetItemRect(IFWL_Widget* pWidget,
-                                FWL_HLISTITEM hItem,
+                                IFWL_ListItem* pItem,
                                 CFX_RectF& rtItem) = 0;
-  virtual void* GetItemData(IFWL_Widget* pWidget, FWL_HLISTITEM hItem) = 0;
+  virtual void* GetItemData(IFWL_Widget* pWidget, IFWL_ListItem* pItem) = 0;
   virtual FWL_Error SetItemStyles(IFWL_Widget* pWidget,
-                                  FWL_HLISTITEM hItem,
+                                  IFWL_ListItem* pItem,
                                   uint32_t dwStyle) = 0;
   virtual FWL_Error SetItemText(IFWL_Widget* pWidget,
-                                FWL_HLISTITEM hItem,
+                                IFWL_ListItem* pItem,
                                 const FX_WCHAR* pszText) = 0;
   virtual FWL_Error SetItemRect(IFWL_Widget* pWidget,
-                                FWL_HLISTITEM hItem,
+                                IFWL_ListItem* pItem,
                                 const CFX_RectF& rtItem) = 0;
   virtual FX_FLOAT GetItemHeight(IFWL_Widget* pWidget) = 0;
   virtual CFX_DIBitmap* GetItemIcon(IFWL_Widget* pWidget,
-                                    FWL_HLISTITEM hItem) = 0;
+                                    IFWL_ListItem* pItem) = 0;
   virtual FWL_Error GetItemCheckRect(IFWL_Widget* pWidget,
-                                     FWL_HLISTITEM hItem,
+                                     IFWL_ListItem* pItem,
                                      CFX_RectF& rtCheck) = 0;
   virtual FWL_Error SetItemCheckRect(IFWL_Widget* pWidget,
-                                     FWL_HLISTITEM hItem,
+                                     IFWL_ListItem* pItem,
                                      const CFX_RectF& rtCheck) = 0;
   virtual uint32_t GetItemCheckState(IFWL_Widget* pWidget,
-                                     FWL_HLISTITEM hItem) = 0;
+                                     IFWL_ListItem* pItem) = 0;
   virtual FWL_Error SetItemCheckState(IFWL_Widget* pWidget,
-                                      FWL_HLISTITEM hItem,
+                                      IFWL_ListItem* pItem,
                                       uint32_t dwCheckState) = 0;
 };
 
 class IFWL_ListBoxCompare {
  public:
   virtual ~IFWL_ListBoxCompare() {}
-  virtual int32_t Compare(FWL_HLISTITEM hLeft, FWL_HLISTITEM hRight) = 0;
+  virtual int32_t Compare(IFWL_ListItem* hLeft, IFWL_ListItem* hRight) = 0;
 };
 
 class IFWL_ListBox : public IFWL_Widget {
@@ -100,10 +101,10 @@ class IFWL_ListBox : public IFWL_Widget {
       IFWL_Widget* pOuter);
 
   int32_t CountSelItems();
-  FWL_HLISTITEM GetSelItem(int32_t nIndexSel);
+  IFWL_ListItem* GetSelItem(int32_t nIndexSel);
   int32_t GetSelIndex(int32_t nIndex);
-  FWL_Error SetSelItem(FWL_HLISTITEM hItem, FX_BOOL bSelect = TRUE);
-  FWL_Error GetItemText(FWL_HLISTITEM hItem, CFX_WideString& wsText);
+  FWL_Error SetSelItem(IFWL_ListItem* pItem, FX_BOOL bSelect = TRUE);
+  FWL_Error GetItemText(IFWL_ListItem* pItem, CFX_WideString& wsText);
   FWL_Error GetScrollPos(FX_FLOAT& fPos, FX_BOOL bVert = TRUE);
 
  protected:
diff --git a/xfa/fwl/lightwidget/cfwl_combobox.cpp b/xfa/fwl/lightwidget/cfwl_combobox.cpp
index d70113b18a..934b0d856e 100644
--- a/xfa/fwl/lightwidget/cfwl_combobox.cpp
+++ b/xfa/fwl/lightwidget/cfwl_combobox.cpp
@@ -69,8 +69,8 @@ int32_t CFWL_ComboBox::CountItems() {
 
 FWL_Error CFWL_ComboBox::GetTextByIndex(int32_t iIndex,
                                         CFX_WideString& wsText) {
-  CFWL_ComboBoxItem* pItem = reinterpret_cast<CFWL_ComboBoxItem*>(
-      m_comboBoxData.GetItem(m_pIface, iIndex));
+  CFWL_ComboBoxItem* pItem =
+      static_cast<CFWL_ComboBoxItem*>(m_comboBoxData.GetItem(m_pIface, iIndex));
   if (!pItem)
     return FWL_Error::Indefinite;
   wsText = pItem->m_wsText;
@@ -158,8 +158,8 @@ FWL_Error CFWL_ComboBox::SetMaxListHeight(FX_FLOAT fMaxHeight) {
 }
 
 FWL_Error CFWL_ComboBox::SetItemData(int32_t iIndex, void* pData) {
-  CFWL_ComboBoxItem* pItem = reinterpret_cast<CFWL_ComboBoxItem*>(
-      m_comboBoxData.GetItem(m_pIface, iIndex));
+  CFWL_ComboBoxItem* pItem =
+      static_cast<CFWL_ComboBoxItem*>(m_comboBoxData.GetItem(m_pIface, iIndex));
   if (!pItem)
     return FWL_Error::Indefinite;
   pItem->m_pData = pData;
@@ -167,8 +167,8 @@ FWL_Error CFWL_ComboBox::SetItemData(int32_t iIndex, void* pData) {
 }
 
 void* CFWL_ComboBox::GetItemData(int32_t iIndex) {
-  CFWL_ComboBoxItem* pItem = reinterpret_cast<CFWL_ComboBoxItem*>(
-      m_comboBoxData.GetItem(m_pIface, iIndex));
+  CFWL_ComboBoxItem* pItem =
+      static_cast<CFWL_ComboBoxItem*>(m_comboBoxData.GetItem(m_pIface, iIndex));
   if (!pItem)
     return NULL;
   return pItem->m_pData;
@@ -294,93 +294,92 @@ int32_t CFWL_ComboBox::CFWL_ComboBoxDP::CountItems(IFWL_Widget* pWidget) {
   return m_ItemArray.size();
 }
 
-FWL_HLISTITEM CFWL_ComboBox::CFWL_ComboBoxDP::GetItem(IFWL_Widget* pWidget,
-                                                      int32_t nIndex) {
+IFWL_ListItem* CFWL_ComboBox::CFWL_ComboBoxDP::GetItem(IFWL_Widget* pWidget,
+                                                       int32_t nIndex) {
   if (nIndex < 0 || static_cast<size_t>(nIndex) >= m_ItemArray.size())
     return nullptr;
 
-  return reinterpret_cast<FWL_HLISTITEM>(m_ItemArray[nIndex].get());
+  return m_ItemArray[nIndex].get();
 }
 
 int32_t CFWL_ComboBox::CFWL_ComboBoxDP::GetItemIndex(IFWL_Widget* pWidget,
-                                                     FWL_HLISTITEM hItem) {
+                                                     IFWL_ListItem* pItem) {
   auto it = std::find_if(
       m_ItemArray.begin(), m_ItemArray.end(),
-      [hItem](const std::unique_ptr<CFWL_ComboBoxItem>& candidate) {
-        return candidate.get() == reinterpret_cast<CFWL_ComboBoxItem*>(hItem);
+      [pItem](const std::unique_ptr<CFWL_ComboBoxItem>& candidate) {
+        return candidate.get() == static_cast<CFWL_ComboBoxItem*>(pItem);
       });
   return it != m_ItemArray.end() ? it - m_ItemArray.begin() : -1;
 }
 
 FX_BOOL CFWL_ComboBox::CFWL_ComboBoxDP::SetItemIndex(IFWL_Widget* pWidget,
-                                                     FWL_HLISTITEM hItem,
+                                                     IFWL_ListItem* pItem,
                                                      int32_t nIndex) {
   if (nIndex < 0 || static_cast<size_t>(nIndex) >= m_ItemArray.size())
     return FALSE;
 
-  m_ItemArray[nIndex].reset(reinterpret_cast<CFWL_ComboBoxItem*>(hItem));
+  m_ItemArray[nIndex].reset(static_cast<CFWL_ComboBoxItem*>(pItem));
   return TRUE;
 }
 
 uint32_t CFWL_ComboBox::CFWL_ComboBoxDP::GetItemStyles(IFWL_Widget* pWidget,
-                                                       FWL_HLISTITEM hItem) {
-  if (!hItem)
+                                                       IFWL_ListItem* pItem) {
+  if (!pItem)
     return 0;
-  return reinterpret_cast<CFWL_ComboBoxItem*>(hItem)->m_dwStyles;
+  return static_cast<CFWL_ComboBoxItem*>(pItem)->m_dwStyles;
 }
 
 FWL_Error CFWL_ComboBox::CFWL_ComboBoxDP::GetItemText(IFWL_Widget* pWidget,
-                                                      FWL_HLISTITEM hItem,
+                                                      IFWL_ListItem* pItem,
                                                       CFX_WideString& wsText) {
-  if (!hItem)
+  if (!pItem)
     return FWL_Error::Indefinite;
-  wsText = reinterpret_cast<CFWL_ComboBoxItem*>(hItem)->m_wsText;
+  wsText = static_cast<CFWL_ComboBoxItem*>(pItem)->m_wsText;
   return FWL_Error::Succeeded;
 }
 
 FWL_Error CFWL_ComboBox::CFWL_ComboBoxDP::GetItemRect(IFWL_Widget* pWidget,
-                                                      FWL_HLISTITEM hItem,
+                                                      IFWL_ListItem* pItem,
                                                       CFX_RectF& rtItem) {
-  if (!hItem)
+  if (!pItem)
     return FWL_Error::Indefinite;
-  CFWL_ComboBoxItem* pItem = reinterpret_cast<CFWL_ComboBoxItem*>(hItem);
-  rtItem.Set(pItem->m_rtItem.left, pItem->m_rtItem.top, pItem->m_rtItem.width,
-             pItem->m_rtItem.height);
+  CFWL_ComboBoxItem* pComboItem = static_cast<CFWL_ComboBoxItem*>(pItem);
+  rtItem.Set(pComboItem->m_rtItem.left, pComboItem->m_rtItem.top,
+             pComboItem->m_rtItem.width, pComboItem->m_rtItem.height);
   return FWL_Error::Succeeded;
 }
 
 void* CFWL_ComboBox::CFWL_ComboBoxDP::GetItemData(IFWL_Widget* pWidget,
-                                                  FWL_HLISTITEM hItem) {
-  if (!hItem)
+                                                  IFWL_ListItem* pItem) {
+  if (!pItem)
     return NULL;
-  CFWL_ComboBoxItem* pItem = reinterpret_cast<CFWL_ComboBoxItem*>(hItem);
-  return pItem->m_pData;
+  return static_cast<CFWL_ComboBoxItem*>(pItem)->m_pData;
 }
 
 FWL_Error CFWL_ComboBox::CFWL_ComboBoxDP::SetItemStyles(IFWL_Widget* pWidget,
-                                                        FWL_HLISTITEM hItem,
+                                                        IFWL_ListItem* pItem,
                                                         uint32_t dwStyle) {
-  if (!hItem)
+  if (!pItem)
     return FWL_Error::Indefinite;
-  reinterpret_cast<CFWL_ComboBoxItem*>(hItem)->m_dwStyles = dwStyle;
+  static_cast<CFWL_ComboBoxItem*>(pItem)->m_dwStyles = dwStyle;
   return FWL_Error::Succeeded;
 }
 
 FWL_Error CFWL_ComboBox::CFWL_ComboBoxDP::SetItemText(IFWL_Widget* pWidget,
-                                                      FWL_HLISTITEM hItem,
+                                                      IFWL_ListItem* pItem,
                                                       const FX_WCHAR* pszText) {
-  if (!hItem)
+  if (!pItem)
     return FWL_Error::Indefinite;
-  reinterpret_cast<CFWL_ComboBoxItem*>(hItem)->m_wsText = pszText;
+  static_cast<CFWL_ComboBoxItem*>(pItem)->m_wsText = pszText;
   return FWL_Error::Succeeded;
 }
 
 FWL_Error CFWL_ComboBox::CFWL_ComboBoxDP::SetItemRect(IFWL_Widget* pWidget,
-                                                      FWL_HLISTITEM hItem,
+                                                      IFWL_ListItem* pItem,
                                                       const CFX_RectF& rtItem) {
-  if (!hItem)
+  if (!pItem)
     return FWL_Error::Indefinite;
-  reinterpret_cast<CFWL_ComboBoxItem*>(hItem)->m_rtItem = rtItem;
+  static_cast<CFWL_ComboBoxItem*>(pItem)->m_rtItem = rtItem;
   return FWL_Error::Succeeded;
 }
 
@@ -388,43 +387,40 @@ FX_FLOAT CFWL_ComboBox::CFWL_ComboBoxDP::GetItemHeight(IFWL_Widget* pWidget) {
   return m_fItemHeight;
 }
 
-CFX_DIBitmap* CFWL_ComboBox::CFWL_ComboBoxDP::GetItemIcon(IFWL_Widget* pWidget,
-                                                          FWL_HLISTITEM hItem) {
-  if (!hItem)
+CFX_DIBitmap* CFWL_ComboBox::CFWL_ComboBoxDP::GetItemIcon(
+    IFWL_Widget* pWidget,
+    IFWL_ListItem* pItem) {
+  if (!pItem)
     return NULL;
-  return reinterpret_cast<CFWL_ComboBoxItem*>(hItem)->m_pDIB;
+  return static_cast<CFWL_ComboBoxItem*>(pItem)->m_pDIB;
 }
 
 FWL_Error CFWL_ComboBox::CFWL_ComboBoxDP::GetItemCheckRect(IFWL_Widget* pWidget,
-                                                           FWL_HLISTITEM hItem,
+                                                           IFWL_ListItem* pItem,
                                                            CFX_RectF& rtCheck) {
-  CFWL_ComboBoxItem* pItem = reinterpret_cast<CFWL_ComboBoxItem*>(hItem);
-  rtCheck = pItem->m_rtCheckBox;
+  rtCheck = static_cast<CFWL_ComboBoxItem*>(pItem)->m_rtCheckBox;
   return FWL_Error::Succeeded;
 }
 
 FWL_Error CFWL_ComboBox::CFWL_ComboBoxDP::SetItemCheckRect(
     IFWL_Widget* pWidget,
-    FWL_HLISTITEM hItem,
+    IFWL_ListItem* pItem,
     const CFX_RectF& rtCheck) {
-  CFWL_ComboBoxItem* pItem = reinterpret_cast<CFWL_ComboBoxItem*>(hItem);
-  pItem->m_rtCheckBox = rtCheck;
+  static_cast<CFWL_ComboBoxItem*>(pItem)->m_rtCheckBox = rtCheck;
   return FWL_Error::Succeeded;
 }
 
 uint32_t CFWL_ComboBox::CFWL_ComboBoxDP::GetItemCheckState(
     IFWL_Widget* pWidget,
-    FWL_HLISTITEM hItem) {
-  CFWL_ComboBoxItem* pItem = reinterpret_cast<CFWL_ComboBoxItem*>(hItem);
-  return pItem->m_dwCheckState;
+    IFWL_ListItem* pItem) {
+  return static_cast<CFWL_ComboBoxItem*>(pItem)->m_dwCheckState;
 }
 
 FWL_Error CFWL_ComboBox::CFWL_ComboBoxDP::SetItemCheckState(
     IFWL_Widget* pWidget,
-    FWL_HLISTITEM hItem,
+    IFWL_ListItem* pItem,
     uint32_t dwCheckState) {
-  CFWL_ComboBoxItem* pItem = reinterpret_cast<CFWL_ComboBoxItem*>(hItem);
-  pItem->m_dwCheckState = dwCheckState;
+  static_cast<CFWL_ComboBoxItem*>(pItem)->m_dwCheckState = dwCheckState;
   return FWL_Error::Succeeded;
 }
 
diff --git a/xfa/fwl/lightwidget/cfwl_combobox.h b/xfa/fwl/lightwidget/cfwl_combobox.h
index b5d0327ba9..a708589d4f 100644
--- a/xfa/fwl/lightwidget/cfwl_combobox.h
+++ b/xfa/fwl/lightwidget/cfwl_combobox.h
@@ -79,42 +79,42 @@ class CFWL_ComboBox : public CFWL_Widget {
     }
 
     virtual int32_t CountItems(IFWL_Widget* pWidget);
-    virtual FWL_HLISTITEM GetItem(IFWL_Widget* pWidget, int32_t nIndex);
-    virtual int32_t GetItemIndex(IFWL_Widget* pWidget, FWL_HLISTITEM hItem);
+    virtual IFWL_ListItem* GetItem(IFWL_Widget* pWidget, int32_t nIndex);
+    virtual int32_t GetItemIndex(IFWL_Widget* pWidget, IFWL_ListItem* pItem);
     virtual FX_BOOL SetItemIndex(IFWL_Widget* pWidget,
-                                 FWL_HLISTITEM hItem,
+                                 IFWL_ListItem* pItem,
                                  int32_t nIndex);
 
-    virtual uint32_t GetItemStyles(IFWL_Widget* pWidget, FWL_HLISTITEM hItem);
+    virtual uint32_t GetItemStyles(IFWL_Widget* pWidget, IFWL_ListItem* pItem);
     virtual FWL_Error GetItemText(IFWL_Widget* pWidget,
-                                  FWL_HLISTITEM hItem,
+                                  IFWL_ListItem* pItem,
                                   CFX_WideString& wsText);
     virtual FWL_Error GetItemRect(IFWL_Widget* pWidget,
-                                  FWL_HLISTITEM hItem,
+                                  IFWL_ListItem* pItem,
                                   CFX_RectF& rtItem);
-    virtual void* GetItemData(IFWL_Widget* pWidget, FWL_HLISTITEM hItem);
+    virtual void* GetItemData(IFWL_Widget* pWidget, IFWL_ListItem* pItem);
     virtual FWL_Error SetItemStyles(IFWL_Widget* pWidget,
-                                    FWL_HLISTITEM hItem,
+                                    IFWL_ListItem* pItem,
                                     uint32_t dwStyle);
     virtual FWL_Error SetItemText(IFWL_Widget* pWidget,
-                                  FWL_HLISTITEM hItem,
+                                  IFWL_ListItem* pItem,
                                   const FX_WCHAR* pszText);
     virtual FWL_Error SetItemRect(IFWL_Widget* pWidget,
-                                  FWL_HLISTITEM hItem,
+                                  IFWL_ListItem* pItem,
                                   const CFX_RectF& rtItem);
     virtual FX_FLOAT GetItemHeight(IFWL_Widget* pWidget);
     virtual CFX_DIBitmap* GetItemIcon(IFWL_Widget* pWidget,
-                                      FWL_HLISTITEM hItem);
+                                      IFWL_ListItem* pItem);
     virtual FWL_Error GetItemCheckRect(IFWL_Widget* pWidget,
-                                       FWL_HLISTITEM hItem,
+                                       IFWL_ListItem* pItem,
                                        CFX_RectF& rtCheck);
     virtual FWL_Error SetItemCheckRect(IFWL_Widget* pWidget,
-                                       FWL_HLISTITEM hItem,
+                                       IFWL_ListItem* pItem,
                                        const CFX_RectF& rtCheck);
     virtual uint32_t GetItemCheckState(IFWL_Widget* pWidget,
-                                       FWL_HLISTITEM hItem);
+                                       IFWL_ListItem* pItem);
     virtual FWL_Error SetItemCheckState(IFWL_Widget* pWidget,
-                                        FWL_HLISTITEM hItem,
+                                        IFWL_ListItem* pItem,
                                         uint32_t dwCheckState);
     virtual FX_FLOAT GetListHeight(IFWL_Widget* pWidget);
 
@@ -125,12 +125,10 @@ class CFWL_ComboBox : public CFWL_Widget {
   CFWL_ComboBoxDP m_comboBoxData;
 };
 
-class CFWL_ComboBoxItem {
+class CFWL_ComboBoxItem : public IFWL_ListItem {
  public:
-  CFWL_ComboBoxItem() {
-    m_pDIB = NULL;
-    m_pData = NULL;
-  }
+  CFWL_ComboBoxItem() : m_pDIB(nullptr), m_pData(nullptr) {}
+
   CFX_RectF m_rtItem;
   uint32_t m_dwStyles;
   CFX_WideString m_wsText;
diff --git a/xfa/fwl/lightwidget/cfwl_listbox.cpp b/xfa/fwl/lightwidget/cfwl_listbox.cpp
index e8e26f5b52..d51db44f3b 100644
--- a/xfa/fwl/lightwidget/cfwl_listbox.cpp
+++ b/xfa/fwl/lightwidget/cfwl_listbox.cpp
@@ -31,23 +31,23 @@ FWL_Error CFWL_ListBox::Initialize(const CFWL_WidgetProperties* pProperties) {
   return FWL_Error::Succeeded;
 }
 
-FWL_Error CFWL_ListBox::AddDIBitmap(CFX_DIBitmap* pDIB, FWL_HLISTITEM hItem) {
-  reinterpret_cast<CFWL_ListItem*>(hItem)->m_pDIB = pDIB;
+FWL_Error CFWL_ListBox::AddDIBitmap(CFX_DIBitmap* pDIB, IFWL_ListItem* pItem) {
+  static_cast<CFWL_ListItem*>(pItem)->m_pDIB = pDIB;
   return FWL_Error::Succeeded;
 }
 
-FWL_HLISTITEM CFWL_ListBox::AddString(const CFX_WideStringC& wsAdd,
-                                      FX_BOOL bSelect) {
+IFWL_ListItem* CFWL_ListBox::AddString(const CFX_WideStringC& wsAdd,
+                                       FX_BOOL bSelect) {
   std::unique_ptr<CFWL_ListItem> pItem(new CFWL_ListItem);
   pItem->m_dwStates = 0;
   pItem->m_wsText = wsAdd;
   pItem->m_dwStates = bSelect ? FWL_ITEMSTATE_LTB_Selected : 0;
   m_ListBoxDP.m_ItemArray.push_back(std::move(pItem));
-  return (FWL_HLISTITEM)m_ListBoxDP.m_ItemArray.back().get();
+  return m_ListBoxDP.m_ItemArray.back().get();
 }
 
-FX_BOOL CFWL_ListBox::DeleteString(FWL_HLISTITEM hItem) {
-  int32_t nIndex = m_ListBoxDP.GetItemIndex(GetWidget(), hItem);
+FX_BOOL CFWL_ListBox::DeleteString(IFWL_ListItem* pItem) {
+  int32_t nIndex = m_ListBoxDP.GetItemIndex(GetWidget(), pItem);
   if (nIndex < 0 ||
       static_cast<size_t>(nIndex) >= m_ListBoxDP.m_ItemArray.size()) {
     return FALSE;
@@ -62,7 +62,7 @@ FX_BOOL CFWL_ListBox::DeleteString(FWL_HLISTITEM hItem) {
   }
   if (iSel >= 0) {
     CFWL_ListItem* pSel =
-        reinterpret_cast<CFWL_ListItem*>(m_ListBoxDP.GetItem(m_pIface, iSel));
+        static_cast<CFWL_ListItem*>(m_ListBoxDP.GetItem(m_pIface, iSel));
     pSel->m_dwStates |= FWL_ITEMSTATE_LTB_Selected;
   }
   m_ListBoxDP.m_ItemArray.erase(m_ListBoxDP.m_ItemArray.begin() + nIndex);
@@ -79,7 +79,7 @@ int32_t CFWL_ListBox::CountSelItems() {
   return static_cast<IFWL_ListBox*>(m_pIface)->CountSelItems();
 }
 
-FWL_HLISTITEM CFWL_ListBox::GetSelItem(int32_t nIndexSel) {
+IFWL_ListItem* CFWL_ListBox::GetSelItem(int32_t nIndexSel) {
   if (!m_pIface)
     return NULL;
   return static_cast<IFWL_ListBox*>(m_pIface)->GetSelItem(nIndexSel);
@@ -91,17 +91,17 @@ int32_t CFWL_ListBox::GetSelIndex(int32_t nIndex) {
   return static_cast<IFWL_ListBox*>(m_pIface)->GetSelIndex(nIndex);
 }
 
-FWL_Error CFWL_ListBox::SetSelItem(FWL_HLISTITEM hItem, FX_BOOL bSelect) {
+FWL_Error CFWL_ListBox::SetSelItem(IFWL_ListItem* pItem, FX_BOOL bSelect) {
   if (!m_pIface)
     return FWL_Error::Indefinite;
-  return static_cast<IFWL_ListBox*>(m_pIface)->SetSelItem(hItem, bSelect);
+  return static_cast<IFWL_ListBox*>(m_pIface)->SetSelItem(pItem, bSelect);
 }
 
-FWL_Error CFWL_ListBox::GetItemText(FWL_HLISTITEM hItem,
+FWL_Error CFWL_ListBox::GetItemText(IFWL_ListItem* pItem,
                                     CFX_WideString& wsText) {
   if (!m_pIface)
     return FWL_Error::Indefinite;
-  return static_cast<IFWL_ListBox*>(m_pIface)->GetItemText(hItem, wsText);
+  return static_cast<IFWL_ListBox*>(m_pIface)->GetItemText(pItem, wsText);
 }
 
 FWL_Error CFWL_ListBox::GetScrollPos(FX_FLOAT& fPos, FX_BOOL bVert) {
@@ -115,16 +115,16 @@ FWL_Error CFWL_ListBox::SetItemHeight(FX_FLOAT fItemHeight) {
   return FWL_Error::Succeeded;
 }
 
-FWL_HLISTITEM CFWL_ListBox::GetFocusItem() {
-  for (const auto& hItem : m_ListBoxDP.m_ItemArray) {
-    if (hItem->m_dwStates & FWL_ITEMSTATE_LTB_Focused)
-      return (FWL_HLISTITEM)hItem.get();
+IFWL_ListItem* CFWL_ListBox::GetFocusItem() {
+  for (const auto& pItem : m_ListBoxDP.m_ItemArray) {
+    if (pItem->m_dwStates & FWL_ITEMSTATE_LTB_Focused)
+      return pItem.get();
   }
   return nullptr;
 }
 
-FWL_Error CFWL_ListBox::SetFocusItem(FWL_HLISTITEM hItem) {
-  int32_t nIndex = m_ListBoxDP.GetItemIndex(GetWidget(), hItem);
+FWL_Error CFWL_ListBox::SetFocusItem(IFWL_ListItem* pItem) {
+  int32_t nIndex = m_ListBoxDP.GetItemIndex(GetWidget(), pItem);
   m_ListBoxDP.m_ItemArray[nIndex]->m_dwStates |= FWL_ITEMSTATE_LTB_Focused;
   return FWL_Error::Succeeded;
 }
@@ -133,43 +133,43 @@ int32_t CFWL_ListBox::CountItems() {
   return pdfium::CollectionSize<int32_t>(m_ListBoxDP.m_ItemArray);
 }
 
-FWL_HLISTITEM CFWL_ListBox::GetItem(int32_t nIndex) {
+IFWL_ListItem* CFWL_ListBox::GetItem(int32_t nIndex) {
   if (nIndex < 0 || nIndex >= CountItems())
     return nullptr;
 
-  return (FWL_HLISTITEM)m_ListBoxDP.m_ItemArray[nIndex].get();
+  return m_ListBoxDP.m_ItemArray[nIndex].get();
 }
 
-FWL_Error CFWL_ListBox::SetItemString(FWL_HLISTITEM hItem,
+FWL_Error CFWL_ListBox::SetItemString(IFWL_ListItem* pItem,
                                       const CFX_WideStringC& wsText) {
-  if (!hItem)
+  if (!pItem)
     return FWL_Error::Indefinite;
-  reinterpret_cast<CFWL_ListItem*>(hItem)->m_wsText = wsText;
+  static_cast<CFWL_ListItem*>(pItem)->m_wsText = wsText;
   return FWL_Error::Succeeded;
 }
 
-FWL_Error CFWL_ListBox::GetItemString(FWL_HLISTITEM hItem,
+FWL_Error CFWL_ListBox::GetItemString(IFWL_ListItem* pItem,
                                       CFX_WideString& wsText) {
-  if (!hItem)
+  if (!pItem)
     return FWL_Error::Indefinite;
-  wsText = reinterpret_cast<CFWL_ListItem*>(hItem)->m_wsText;
+  wsText = static_cast<CFWL_ListItem*>(pItem)->m_wsText;
   return FWL_Error::Succeeded;
 }
 
-FWL_Error CFWL_ListBox::SetItemData(FWL_HLISTITEM hItem, void* pData) {
-  if (!hItem)
+FWL_Error CFWL_ListBox::SetItemData(IFWL_ListItem* pItem, void* pData) {
+  if (!pItem)
     return FWL_Error::Indefinite;
-  reinterpret_cast<CFWL_ListItem*>(hItem)->m_pData = pData;
+  static_cast<CFWL_ListItem*>(pItem)->m_pData = pData;
   return FWL_Error::Succeeded;
 }
 
-void* CFWL_ListBox::GetItemData(FWL_HLISTITEM hItem) {
-  if (!hItem)
+void* CFWL_ListBox::GetItemData(IFWL_ListItem* pItem) {
+  if (!pItem)
     return NULL;
-  return reinterpret_cast<CFWL_ListItem*>(hItem)->m_pData;
+  return static_cast<CFWL_ListItem*>(pItem)->m_pData;
 }
 
-FWL_HLISTITEM CFWL_ListBox::GetItemAtPoint(FX_FLOAT fx, FX_FLOAT fy) {
+IFWL_ListItem* CFWL_ListBox::GetItemAtPoint(FX_FLOAT fx, FX_FLOAT fy) {
   CFX_RectF rtClient;
   m_pIface->GetClientRect(rtClient);
   fx -= rtClient.left;
@@ -180,25 +180,25 @@ FWL_HLISTITEM CFWL_ListBox::GetItemAtPoint(FX_FLOAT fx, FX_FLOAT fy) {
   static_cast<IFWL_ListBox*>(m_pIface)->GetScrollPos(fy, FALSE);
   int32_t nCount = m_ListBoxDP.CountItems(NULL);
   for (int32_t i = 0; i < nCount; i++) {
-    FWL_HLISTITEM hItem = m_ListBoxDP.GetItem(NULL, i);
-    if (!hItem) {
+    IFWL_ListItem* pItem = m_ListBoxDP.GetItem(NULL, i);
+    if (!pItem) {
       continue;
     }
     CFX_RectF rtItem;
-    m_ListBoxDP.GetItemRect(NULL, hItem, rtItem);
+    m_ListBoxDP.GetItemRect(NULL, pItem, rtItem);
     rtItem.Offset(-fPosX, -fPosY);
     if (rtItem.Contains(fx, fy)) {
-      return hItem;
+      return pItem;
     }
   }
   return NULL;
 }
 
-uint32_t CFWL_ListBox::GetItemStates(FWL_HLISTITEM hItem) {
-  if (!hItem)
+uint32_t CFWL_ListBox::GetItemStates(IFWL_ListItem* pItem) {
+  if (!pItem)
     return 0;
-  CFWL_ListItem* pItem = reinterpret_cast<CFWL_ListItem*>(hItem);
-  return pItem->m_dwStates | pItem->m_dwCheckState;
+  CFWL_ListItem* pListItem = static_cast<CFWL_ListItem*>(pItem);
+  return pListItem->m_dwStates | pListItem->m_dwCheckState;
 }
 
 CFWL_ListBox::CFWL_ListBox() {}
@@ -219,91 +219,89 @@ int32_t CFWL_ListBox::CFWL_ListBoxDP::CountItems(IFWL_Widget* pWidget) {
   return pdfium::CollectionSize<int32_t>(m_ItemArray);
 }
 
-FWL_HLISTITEM CFWL_ListBox::CFWL_ListBoxDP::GetItem(IFWL_Widget* pWidget,
-                                                    int32_t nIndex) {
+IFWL_ListItem* CFWL_ListBox::CFWL_ListBoxDP::GetItem(IFWL_Widget* pWidget,
+                                                     int32_t nIndex) {
   if (nIndex < 0 || nIndex >= CountItems(pWidget))
     return nullptr;
 
-  return (FWL_HLISTITEM)m_ItemArray[nIndex].get();
+  return m_ItemArray[nIndex].get();
 }
 
 int32_t CFWL_ListBox::CFWL_ListBoxDP::GetItemIndex(IFWL_Widget* pWidget,
-                                                   FWL_HLISTITEM hItem) {
+                                                   IFWL_ListItem* pItem) {
   auto it = std::find_if(
       m_ItemArray.begin(), m_ItemArray.end(),
-      [hItem](const std::unique_ptr<CFWL_ListItem>& candidate) {
-        return candidate.get() == reinterpret_cast<CFWL_ListItem*>(hItem);
+      [pItem](const std::unique_ptr<CFWL_ListItem>& candidate) {
+        return candidate.get() == static_cast<CFWL_ListItem*>(pItem);
       });
   return it != m_ItemArray.end() ? it - m_ItemArray.begin() : -1;
 }
 
 FX_BOOL CFWL_ListBox::CFWL_ListBoxDP::SetItemIndex(IFWL_Widget* pWidget,
-                                                   FWL_HLISTITEM hItem,
+                                                   IFWL_ListItem* pItem,
                                                    int32_t nIndex) {
   if (nIndex < 0 || nIndex >= CountItems(pWidget))
     return FALSE;
-  m_ItemArray[nIndex].reset(reinterpret_cast<CFWL_ListItem*>(hItem));
+  m_ItemArray[nIndex].reset(static_cast<CFWL_ListItem*>(pItem));
   return TRUE;
 }
 
 uint32_t CFWL_ListBox::CFWL_ListBoxDP::GetItemStyles(IFWL_Widget* pWidget,
-                                                     FWL_HLISTITEM hItem) {
-  if (!hItem)
+                                                     IFWL_ListItem* pItem) {
+  if (!pItem)
     return 0;
-  return reinterpret_cast<CFWL_ListItem*>(hItem)->m_dwStates;
+  return static_cast<CFWL_ListItem*>(pItem)->m_dwStates;
 }
 
 FWL_Error CFWL_ListBox::CFWL_ListBoxDP::GetItemText(IFWL_Widget* pWidget,
-                                                    FWL_HLISTITEM hItem,
+                                                    IFWL_ListItem* pItem,
                                                     CFX_WideString& wsText) {
-  if (!hItem)
+  if (!pItem)
     return FWL_Error::Indefinite;
-  wsText = reinterpret_cast<CFWL_ListItem*>(hItem)->m_wsText;
+  wsText = static_cast<CFWL_ListItem*>(pItem)->m_wsText;
   return FWL_Error::Succeeded;
 }
 
 FWL_Error CFWL_ListBox::CFWL_ListBoxDP::GetItemRect(IFWL_Widget* pWidget,
-                                                    FWL_HLISTITEM hItem,
+                                                    IFWL_ListItem* pItem,
                                                     CFX_RectF& rtItem) {
-  if (!hItem)
+  if (!pItem)
     return FWL_Error::Indefinite;
-  CFWL_ListItem* pItem = reinterpret_cast<CFWL_ListItem*>(hItem);
-  rtItem = pItem->m_rtItem;
+  rtItem = static_cast<CFWL_ListItem*>(pItem)->m_rtItem;
   return FWL_Error::Succeeded;
 }
 
 void* CFWL_ListBox::CFWL_ListBoxDP::GetItemData(IFWL_Widget* pWidget,
-                                                FWL_HLISTITEM hItem) {
-  if (!hItem)
+                                                IFWL_ListItem* pItem) {
+  if (!pItem)
     return NULL;
-  CFWL_ListItem* pItem = reinterpret_cast<CFWL_ListItem*>(hItem);
-  return pItem->m_pData;
+  return static_cast<CFWL_ListItem*>(pItem)->m_pData;
 }
 
 FWL_Error CFWL_ListBox::CFWL_ListBoxDP::SetItemStyles(IFWL_Widget* pWidget,
-                                                      FWL_HLISTITEM hItem,
+                                                      IFWL_ListItem* pItem,
                                                       uint32_t dwStyle) {
-  if (!hItem)
+  if (!pItem)
     return FWL_Error::Indefinite;
-  reinterpret_cast<CFWL_ListItem*>(hItem)->m_dwStates = dwStyle;
+  static_cast<CFWL_ListItem*>(pItem)->m_dwStates = dwStyle;
   return FWL_Error::Succeeded;
 }
 
 FWL_Error CFWL_ListBox::CFWL_ListBoxDP::SetItemText(IFWL_Widget* pWidget,
-                                                    FWL_HLISTITEM hItem,
+                                                    IFWL_ListItem* pItem,
                                                     const FX_WCHAR* pszText) {
-  if (!hItem)
+  if (!pItem)
     return FWL_Error::Indefinite;
-  reinterpret_cast<CFWL_ListItem*>(hItem)->m_wsText = pszText;
+  static_cast<CFWL_ListItem*>(pItem)->m_wsText = pszText;
   return FWL_Error::Succeeded;
 }
 
 FWL_Error CFWL_ListBox::CFWL_ListBoxDP::SetItemRect(IFWL_Widget* pWidget,
-                                                    FWL_HLISTITEM hItem,
+                                                    IFWL_ListItem* pItem,
                                                     const CFX_RectF& rtItem) {
-  if (!hItem)
+  if (!pItem)
     return FWL_Error::Indefinite;
-  reinterpret_cast<CFWL_ListItem*>(hItem)->m_rtItem = rtItem;
+  static_cast<CFWL_ListItem*>(pItem)->m_rtItem = rtItem;
   return FWL_Error::Succeeded;
 }
 
@@ -312,34 +310,34 @@ FX_FLOAT CFWL_ListBox::CFWL_ListBoxDP::GetItemHeight(IFWL_Widget* pWidget) {
 }
 
 CFX_DIBitmap* CFWL_ListBox::CFWL_ListBoxDP::GetItemIcon(IFWL_Widget* pWidget,
-                                                        FWL_HLISTITEM hItem) {
-  return reinterpret_cast<CFWL_ListItem*>(hItem)->m_pDIB;
+                                                        IFWL_ListItem* pItem) {
+  return static_cast<CFWL_ListItem*>(pItem)->m_pDIB;
 }
 
 FWL_Error CFWL_ListBox::CFWL_ListBoxDP::GetItemCheckRect(IFWL_Widget* pWidget,
-                                                         FWL_HLISTITEM hItem,
+                                                         IFWL_ListItem* pItem,
                                                          CFX_RectF& rtCheck) {
-  rtCheck = reinterpret_cast<CFWL_ListItem*>(hItem)->m_rtCheckBox;
+  rtCheck = static_cast<CFWL_ListItem*>(pItem)->m_rtCheckBox;
   return FWL_Error::Succeeded;
 }
 
 FWL_Error CFWL_ListBox::CFWL_ListBoxDP::SetItemCheckRect(
     IFWL_Widget* pWidget,
-    FWL_HLISTITEM hItem,
+    IFWL_ListItem* pItem,
     const CFX_RectF& rtCheck) {
-  reinterpret_cast<CFWL_ListItem*>(hItem)->m_rtCheckBox = rtCheck;
+  static_cast<CFWL_ListItem*>(pItem)->m_rtCheckBox = rtCheck;
   return FWL_Error::Succeeded;
 }
 
 uint32_t CFWL_ListBox::CFWL_ListBoxDP::GetItemCheckState(IFWL_Widget* pWidget,
-                                                         FWL_HLISTITEM hItem) {
-  return reinterpret_cast<CFWL_ListItem*>(hItem)->m_dwCheckState;
+                                                         IFWL_ListItem* pItem) {
+  return static_cast<CFWL_ListItem*>(pItem)->m_dwCheckState;
 }
 
 FWL_Error CFWL_ListBox::CFWL_ListBoxDP::SetItemCheckState(
     IFWL_Widget* pWidget,
-    FWL_HLISTITEM hItem,
+    IFWL_ListItem* pItem,
     uint32_t dwCheckState) {
-  reinterpret_cast<CFWL_ListItem*>(hItem)->m_dwCheckState = dwCheckState;
+  static_cast<CFWL_ListItem*>(pItem)->m_dwCheckState = dwCheckState;
   return FWL_Error::Succeeded;
 }
diff --git a/xfa/fwl/lightwidget/cfwl_listbox.h b/xfa/fwl/lightwidget/cfwl_listbox.h
index a40d0f975c..7d79893fa6 100644
--- a/xfa/fwl/lightwidget/cfwl_listbox.h
+++ b/xfa/fwl/lightwidget/cfwl_listbox.h
@@ -21,28 +21,28 @@ class CFWL_ListBox : public CFWL_Widget {
  public:
   static CFWL_ListBox* Create();
   FWL_Error Initialize(const CFWL_WidgetProperties* pProperties = NULL);
-  FWL_Error AddDIBitmap(CFX_DIBitmap* pDIB, FWL_HLISTITEM hItem);
-  FWL_HLISTITEM AddString(const CFX_WideStringC& wsAdd,
-                          FX_BOOL bSelect = FALSE);
-  FX_BOOL DeleteString(FWL_HLISTITEM hItem);
+  FWL_Error AddDIBitmap(CFX_DIBitmap* pDIB, IFWL_ListItem* pItem);
+  IFWL_ListItem* AddString(const CFX_WideStringC& wsAdd,
+                           FX_BOOL bSelect = FALSE);
+  FX_BOOL DeleteString(IFWL_ListItem* pItem);
   void DeleteAll();
   int32_t CountSelItems();
-  FWL_HLISTITEM GetSelItem(int32_t nIndexSel);
+  IFWL_ListItem* GetSelItem(int32_t nIndexSel);
   int32_t GetSelIndex(int32_t nIndex);
-  FWL_Error SetSelItem(FWL_HLISTITEM hItem, FX_BOOL bSelect = TRUE);
-  FWL_Error GetItemText(FWL_HLISTITEM hItem, CFX_WideString& wsText);
+  FWL_Error SetSelItem(IFWL_ListItem* pItem, FX_BOOL bSelect = TRUE);
+  FWL_Error GetItemText(IFWL_ListItem* pItem, CFX_WideString& wsText);
   FWL_Error GetScrollPos(FX_FLOAT& fPos, FX_BOOL bVert = TRUE);
   FWL_Error SetItemHeight(FX_FLOAT fItemHeight);
-  FWL_HLISTITEM GetFocusItem();
-  FWL_Error SetFocusItem(FWL_HLISTITEM hItem);
+  IFWL_ListItem* GetFocusItem();
+  FWL_Error SetFocusItem(IFWL_ListItem* pItem);
   int32_t CountItems();
-  FWL_HLISTITEM GetItem(int32_t nIndex);
-  FWL_Error SetItemString(FWL_HLISTITEM hItem, const CFX_WideStringC& wsText);
-  FWL_Error GetItemString(FWL_HLISTITEM hItem, CFX_WideString& wsText);
-  FWL_Error SetItemData(FWL_HLISTITEM hItem, void* pData);
-  void* GetItemData(FWL_HLISTITEM hItem);
-  FWL_HLISTITEM GetItemAtPoint(FX_FLOAT fx, FX_FLOAT fy);
-  uint32_t GetItemStates(FWL_HLISTITEM hItem);
+  IFWL_ListItem* GetItem(int32_t nIndex);
+  FWL_Error SetItemString(IFWL_ListItem* pItem, const CFX_WideStringC& wsText);
+  FWL_Error GetItemString(IFWL_ListItem* pItem, CFX_WideString& wsText);
+  FWL_Error SetItemData(IFWL_ListItem* pItem, void* pData);
+  void* GetItemData(IFWL_ListItem* pItem);
+  IFWL_ListItem* GetItemAtPoint(FX_FLOAT fx, FX_FLOAT fy);
+  uint32_t GetItemStates(IFWL_ListItem* pItem);
   CFWL_ListBox();
   virtual ~CFWL_ListBox();
 
@@ -58,41 +58,41 @@ class CFWL_ListBox : public CFWL_Widget {
 
     // IFWL_ListBoxDP:
     int32_t CountItems(IFWL_Widget* pWidget) override;
-    FWL_HLISTITEM GetItem(IFWL_Widget* pWidget, int32_t nIndex) override;
-    int32_t GetItemIndex(IFWL_Widget* pWidget, FWL_HLISTITEM hItem) override;
+    IFWL_ListItem* GetItem(IFWL_Widget* pWidget, int32_t nIndex) override;
+    int32_t GetItemIndex(IFWL_Widget* pWidget, IFWL_ListItem* pItem) override;
     FX_BOOL SetItemIndex(IFWL_Widget* pWidget,
-                         FWL_HLISTITEM hItem,
+                         IFWL_ListItem* pItem,
                          int32_t nIndex) override;
-    uint32_t GetItemStyles(IFWL_Widget* pWidget, FWL_HLISTITEM hItem) override;
+    uint32_t GetItemStyles(IFWL_Widget* pWidget, IFWL_ListItem* pItem) override;
     FWL_Error GetItemText(IFWL_Widget* pWidget,
-                          FWL_HLISTITEM hItem,
+                          IFWL_ListItem* pItem,
                           CFX_WideString& wsText) override;
     FWL_Error GetItemRect(IFWL_Widget* pWidget,
-                          FWL_HLISTITEM hItem,
+                          IFWL_ListItem* pItem,
                           CFX_RectF& rtItem) override;
-    void* GetItemData(IFWL_Widget* pWidget, FWL_HLISTITEM hItem) override;
+    void* GetItemData(IFWL_Widget* pWidget, IFWL_ListItem* pItem) override;
     FWL_Error SetItemStyles(IFWL_Widget* pWidget,
-                            FWL_HLISTITEM hItem,
+                            IFWL_ListItem* pItem,
                             uint32_t dwStyle) override;
     FWL_Error SetItemText(IFWL_Widget* pWidget,
-                          FWL_HLISTITEM hItem,
+                          IFWL_ListItem* pItem,
                           const FX_WCHAR* pszText) override;
     FWL_Error SetItemRect(IFWL_Widget* pWidget,
-                          FWL_HLISTITEM hItem,
+                          IFWL_ListItem* pItem,
                           const CFX_RectF& rtItem) override;
     FX_FLOAT GetItemHeight(IFWL_Widget* pWidget) override;
     CFX_DIBitmap* GetItemIcon(IFWL_Widget* pWidget,
-                              FWL_HLISTITEM hItem) override;
+                              IFWL_ListItem* pItem) override;
     FWL_Error GetItemCheckRect(IFWL_Widget* pWidget,
-                               FWL_HLISTITEM hItem,
+                               IFWL_ListItem* pItem,
                                CFX_RectF& rtCheck) override;
     FWL_Error SetItemCheckRect(IFWL_Widget* pWidget,
-                               FWL_HLISTITEM hItem,
+                               IFWL_ListItem* pItem,
                                const CFX_RectF& rtCheck) override;
     uint32_t GetItemCheckState(IFWL_Widget* pWidget,
-                               FWL_HLISTITEM hItem) override;
+                               IFWL_ListItem* pItem) override;
     FWL_Error SetItemCheckState(IFWL_Widget* pWidget,
-                                FWL_HLISTITEM hItem,
+                                IFWL_ListItem* pItem,
                                 uint32_t dwCheckState) override;
 
     std::vector<std::unique_ptr<CFWL_ListItem>> m_ItemArray;
@@ -103,7 +103,7 @@ class CFWL_ListBox : public CFWL_Widget {
   CFWL_ListBoxDP m_ListBoxDP;
 };
 
-class CFWL_ListItem {
+class CFWL_ListItem : public IFWL_ListItem {
  public:
   CFWL_ListItem() {
     m_rtItem.Reset();