sendmessage WM_PAINT带背景的窗体_sendmessage
//WM_PAINT带背景的窗体
private
{ Private declarations }
Bitmap:TBitmap;
procedure WMPaint(var msg:TWMPAINT);Message WM_PAINT;
procedure TForm1.WMPaint(var msg:TWMPAINT);
begin
inherited;
StretchBlt(canvas.Handle,0,0,width,height,Bitmap.Canvas.Handle,0,0,Bitmap.Width,Bitmap.Height,srccopy);
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
Bitmap:=TBitmap.Create;
Bitmap.LoadFromFile('1.bmp');
end;
procedure TForm1.FormResize(Sender: TObject);
begin
sendmessage(self.Handle,WM_Paint,0,0);
end;
