RgnHandle updateRgn = NewRgn() ;
RectRgn( updateRgn , &r ) ;
HIViewSetNeedsDisplayInRegion( (HIViewRef) win->GetHandle() , updateRgn , true ) ;
RgnHandle updateRgn = NewRgn() ;
RectRgn( updateRgn , &r ) ;
HIViewSetNeedsDisplayInRegion( (HIViewRef) win->GetHandle() , updateRgn , true ) ;