1   
2   unit Unit1;
3   
4   interface
5   
6   uses
7     Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
8     Dialogs, StdCtrls;
9   
10  type
11    TForm1 = class(TForm)
12      Button1: TButton;
13      procedure Button1Click(Sender: TObject);
14    private
15      { Private declarations }
16    public
17      { Public declarations }
18    end;
19  
20  var
21    Form1: TForm1;
22  
23  implementation
24  
25  {$R *.dfm}
26  
27  procedure TForm1.Button1Click(Sender: TObject);
28  var
29    DeskTopCanvas: TCanvas;
30    DeskTopRect: TRect;
31    Bitmap: TBitmap;
32  begin
33    DeskTopCanvas := TCanvas.Create;
34    DeskTopCanvas.Handle := GetDC(0);
35    DeskTopRect := Rect(0,0,Screen.Width,Screen.Height);
36    Bitmap := TBitmap.Create;
37    with Bitmap do
38    begin
39      Width := Screen.Width;
40      Height:= Screen.Height;
41      PixelFormat := pfDevice;
42    end;
43    Bitmap.Canvas.CopyRect(DeskTopRect,DeskTopCanvas,DeskTopRect);
44    Bitmap.SaveToFile ('c:\desktop.bmp');
45    Bitmap.Free;
46    DesktopCanvas.Free;
47    ReleaseDC(GetDeskTopWindow,GetDC(0));
48  
49  end;
50  
51  end.
52