upaintdesktop.pas

Delphi Win32核心API参考光盘源码 本书包含了常用的Windows API函数

unit UPaintDesktop;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  StdCtrls;

type
  TForm1 = class(TForm)
    procedure FormPaint(Sender: TObject);
  private
    { Private declarations }
    procedure WMMoving(var Msg: TMessage); message WM_MOVING;
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.FormPaint(Sender: TObject);
begin
  {display the desktop wallpaper}
  PaintDesktop(Canvas.Handle);
end;

procedure TForm1.WMMoving(var Msg: TMessage);
begin
  {display the destop wallpaper when moving}
  PaintDesktop(Canvas.Handle);
end;

end.