unit Unit1;
 
interface
 
uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;
 
type
  TForm1 = class(TForm)
    Button1: TButton;
    Label1: TLabel;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;
 
var
  Form1: TForm1;
 
implementation
 
{$R *.dfm}
 
procedure TForm1.Button1Click(Sender: TObject);
var
  DCDesk: HDC;
begin
  DCDesk:=GetWindowDC(GetDesktopWindow);
  BitBlt(Form1.Canvas.Handle, 0, 0, Screen.Width, Screen.Height,DCDesk, 0, 0,SRCCOPY);
  ReleaseDC(GetDesktopWindow, DCDesk);
end;
 
 
 
 
end.