4 files changed, 8 insertions, 2 deletions
diff --git a/xfa/src/fwl/src/basewidget/include/fwl_caretimp.h b/xfa/src/fwl/src/basewidget/include/fwl_caretimp.h
index f4d090acb4..6e9d197097 100644
--- a/xfa/src/fwl/src/basewidget/include/fwl_caretimp.h
+++ b/xfa/src/fwl/src/basewidget/include/fwl_caretimp.h
@@ -37,6 +37,7 @@ protected:
     {
     public:
         CFWL_CaretTimer(CFWL_CaretImp *m_pCaret);
+        virtual ~CFWL_CaretTimer() {}
         virtual int32_t Run(FWL_HTIMER hTimer);
         CFWL_CaretImp *m_pCaret;
 
diff --git a/xfa/src/fwl/src/core/include/fwl_noteimp.h b/xfa/src/fwl/src/core/include/fwl_noteimp.h
index 78afc35313..cc94b37fa4 100644
--- a/xfa/src/fwl/src/core/include/fwl_noteimp.h
+++ b/xfa/src/fwl/src/core/include/fwl_noteimp.h
@@ -16,10 +16,12 @@ class CFWL_NoteLoop;
 class CFWL_NoteDriver;
 class CFWL_EventTarget;
 class CFWL_ToolTipContainer;
+
 class CFWL_NoteLoop
 {
 public:
     CFWL_NoteLoop(CFWL_WidgetImp *pForm = NULL);
+    virtual ~CFWL_NoteLoop() {}
     virtual FX_BOOL PreProcessMessage(CFWL_Message *pMessage);
     virtual FWL_ERR	Idle(int32_t count);
     CFWL_WidgetImp*	GetForm();
@@ -37,7 +39,7 @@ class CFWL_NoteDriver
 {
 public:
     CFWL_NoteDriver();
-    ~CFWL_NoteDriver();
+    virtual ~CFWL_NoteDriver();
     virtual FX_BOOL		SendNote(CFWL_Note *pNote);
     virtual FX_BOOL		PostMessage(CFWL_Message *pMessage);
     virtual FWL_ERR		RegisterEventTarget(IFWL_Widget *pListener, IFWL_Widget *pEventSource = NULL, FX_DWORD dwFilter = FWL_EVENT_ALL_MASK);
diff --git a/xfa/src/fwl/src/core/include/fwl_widgetimp.h b/xfa/src/fwl/src/core/include/fwl_widgetimp.h
index af4ceced95..fa523f390c 100644
--- a/xfa/src/fwl/src/core/include/fwl_widgetimp.h
+++ b/xfa/src/fwl/src/core/include/fwl_widgetimp.h
@@ -121,6 +121,7 @@ class CFWL_WidgetImpDelegate
 {
 public:
     CFWL_WidgetImpDelegate();
+    virtual ~CFWL_WidgetImpDelegate() {}
     virtual int32_t	OnProcessMessage(CFWL_Message *pMessage);
     virtual FWL_ERR		OnProcessEvent(CFWL_Event *pEvent);
     virtual FWL_ERR		OnDrawWidget(CFX_Graphics *pGraphics, const CFX_Matrix *pMatrix = NULL);
diff --git a/xfa/src/fwl/src/core/include/fwl_widgetmgrimp.h b/xfa/src/fwl/src/core/include/fwl_widgetmgrimp.h
index f9b465fc52..31b978ec97 100644
--- a/xfa/src/fwl/src/core/include/fwl_widgetmgrimp.h
+++ b/xfa/src/fwl/src/core/include/fwl_widgetmgrimp.h
@@ -49,11 +49,12 @@ public:
     FX_BOOL				bOutsideChanged;
 #endif
 };
+
 class CFWL_WidgetMgr
 {
 public:
     CFWL_WidgetMgr(IFWL_AdapterNative *pAdapterNative);
-    ~CFWL_WidgetMgr();
+    virtual ~CFWL_WidgetMgr();
     virtual int32_t		CountWidgets(IFWL_Widget *pParent = NULL);
     virtual IFWL_Widget*	GetWidget(int32_t nIndex, IFWL_Widget *pParent = NULL);
     virtual IFWL_Widget*	GetWidget(IFWL_Widget *pWidget, FWL_WGTRELATION eRelation);
@@ -127,6 +128,7 @@ class CFWL_WidgetMgrDelegate
 {
 public:
     CFWL_WidgetMgrDelegate(CFWL_WidgetMgr *pWidgetMgr);
+    virtual ~CFWL_WidgetMgrDelegate() {}
     virtual FWL_ERR		OnSetCapability(FX_DWORD dwCapability = FWL_WGTMGR_DisableThread);
     virtual int32_t	OnProcessMessageToForm(CFWL_Message *pMessage);
     virtual	FWL_ERR		OnDrawWidget(IFWL_Widget *pWidget, CFX_Graphics *pGraphics, const CFX_Matrix *pMatrix );