Protected Overridable Sub OnItemsChanged( _
   ByVal sender As Object, _
   ByVal args As ItemsChangedEventArgs _
) 

Dim instance As ISVirtualizingPanel
Dim sender As Object
Dim args As ItemsChangedEventArgs
 
instance.OnItemsChanged(sender, args)

protected virtual void OnItemsChanged( 
   object sender,
   ItemsChangedEventArgs args
)

protected procedure OnItemsChanged( 
    sender: TObject;
    args: ItemsChangedEventArgs
); virtual; 

protected function OnItemsChanged( 
   sender : Object,
   args : ItemsChangedEventArgs
);

protected: virtual void OnItemsChanged( 
   Object* sender,
   ItemsChangedEventArgs* args
) 

protected:
virtual void OnItemsChanged( 
   Object^ sender,
   ItemsChangedEventArgs^ args
)