delphi 实现TPanel控件透明效果

【例子介绍】实现TPanel控件透明，见效果图。

【相关图片】

【源码结构】procedure TGlass.Paint;
var
  R: TRect;
  rop: LongInt;
begin
  R := Rect(0, 0, Width, Height);
  Buffer.Width := Width;
  Buffer.Height := Height;
  Buffer.Canvas.Brush.Style := bsSolid;
  Buffer.Canvas.Brush.Color := FColor;
  Buffer.Canvas.FillRect(Rect(0, 0, Width, Height));
  rop := GlassStyleToInt(FStyle);
  StretchBlt(Buffer.Canvas.Handle, 0, 0, Width, Height, Canvas.Handle, 0, 0, Width, Height, rop);
  if Ctl3D then
    DrawEdge(Buffer.Canvas.Handle, R, BDR_RAISEDINNER, BF_RECT);
  Buffer.Canvas.Pen.Mode := pmCopy;
  Buffer.Canvas.Pen.Style := psSolid;
  Canvas.Draw(0, 0, Buffer);
  if Assigned(FOnPaint) then
    FOnPaint(Self);
end;