实时的透明窗体
procedure TForm1.TrackBar1Change(Sender: TObject);
begin
self.AlphaBlendValue:=self.TrackBar1.Max-self.TrackBar1.Position;
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
self.AlphaBlend:=True;
self.TrackBar1.Min:=0;
self.TrackBar1.Max:=255;
self.TrackBar1.Frequency:=25;
end;