Base wndProc. All messages are sent to wndProc after getting filtered through the preProcessMessage function. Inheriting controls should call base.wndProc for any messages that they don't handle.
[Visual Basic] Overridable Protected Sub WndProc( _ ByRef m As Message _ ) [C#] protected virtual void WndProc( ref Message m ); [C++] protected: virtual void WndProc( Message** m ); [JScript] protected function WndProc( m : Message );