Protected Overridable Sub OnContentChanged( _
   ByVal oldContent As Object, _
   ByVal newContent As Object _
) 

Dim instance As UXRibbonGalleryCategory
Dim oldContent As Object
Dim newContent As Object
 
instance.OnContentChanged(oldContent, newContent)

protected virtual void OnContentChanged( 
   object oldContent,
   object newContent
)

protected procedure OnContentChanged( 
    oldContent: TObject;
    newContent: TObject
); virtual; 

protected function OnContentChanged( 
   oldContent : Object,
   newContent : Object
);

protected: virtual void OnContentChanged( 
   Object* oldContent,
   Object* newContent
) 

protected:
virtual void OnContentChanged( 
   Object^ oldContent,
   Object^ newContent
)