procedure CopyCurrentDesktop(IncludeCur:Boolean);
var
DesktophWnd:hWnd;
DesktopDC:hWnd;
CursorhWnd:hWnd;
CurPos:Tpoint;
Rect:TRect;
Bitmap:TBitmap;
begin
DesktophWnd := GetDesktopWindow();
DesktopDC := GetDC(DesktophWnd);
GetWindowRect(DesktophWnd, Rect);
if IncludeCur then
begin
CursorhWnd:=GetCursor(); //捕获当前鼠标指针句柄
GetCursorPos(CurPos);
end; //获取当前鼠标指针的位置坐标
Bitmap := TBitmap.Create;//生成一个Tbitmap类型的实例对象
Bitmap.Width := Rect.Right-Rect.Left;
Bitmap.Height := Rect.Bottom-Rect.Top;
BitBlt(Bitmap.Canvas.Handle, 0, 0,
Bitmap.Width, Bitmap.Height, DesktopDC, 0, 0, SRCCOPY);

//在抓取到的位图对象上绘制鼠标
if IncludeCur then
DrawIcon(Bitmap.Canvas.Handle, CurPos.X, CurPos.Y, CursorhWnd);
ReleaseDC(DesktophWnd, DesktopDC);
Bitmap.SaveToFile('C:\Desktop.bmp'); //使用类方法SaveToFile保存文件
Bitmap.Free;
ShowMessage('成功抓取屏幕并保存图像至C:\Desktop.bmp文件!');
end;


procedure TForm1.Button1Click(Sender: TObject);
begin
Button2.Enabled:=False;
if RadioButton1.Checked then
CopyCurrentDesktop(True)
else
CopyCurrentDesktop(False);
Button2.Enabled:=True;
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
ShellExecute(handle,'open','C:\Desktop.bmp',nil,nil,SW_Normal);
end;

end.