unit1.pas

来自「精彩编程百例26～50 其中有 控制任务栏 windows底层任务控制 屏保预览」· PAS 代码 · 共 44 行

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  jpeg, ExtCtrls;

type
  TForm1 = class(TForm)
    Image1: TImage;
    procedure FormCreate(Sender: TObject);
    procedure FormResize(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.FormCreate(Sender: TObject);
var
  hRegion: THandle;
begin
  hRegion := CreateEllipticRgn (0, - Height, Width, Height);
  SetWindowRgn (Handle, hRegion, True);
end;

procedure TForm1.FormResize(Sender: TObject);
var
  hRegion: THandle;
begin
  hRegion := CreateEllipticRgn (0, - Height, Width, Height);
  SetWindowRgn (Handle, hRegion, True);
end;

end.