Как работать с буфером обмена (Clipboard)

procedure TForm1.Button1Click(Sender: TObject);
var
  FormImage: TBitmap;
begin
  FormImage := GetFormImage;
  try
    Clipboard.Assign(FormImage);
    Image1.Picture.Assign(Clipboard);
  finally
    FormImage.Free;
  end;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  Shape1.Shape := stEllipse;
  Shape1.Brush.Color := clLime;
  Image1.Stretch := True;
end;

procedure CopyScreenToClipboard;
var
  dx,dy: integer;
  hSourcDC, hDestDC, hBM, hbmOld: THandle;
begin
  dx := screen.width;
  dy := screen.height;
  hSourcDC := CreateDC('DISPLAY', nil, nil, nil);
  hDestDC := CreateCompatibleDC(hSourcDC);
  hBM := CreateCompatibleBitmap(hSourcDC, dx, dy);
  hbmold:= SelectObject(hDestDC, hBM);
  BitBlt(hDestDC, 0, 0, dx, dy, hSourcDC, 0, 0, SRCCopy);
  OpenClipBoard(form1.handle);
  EmptyClipBoard;
  SetClipBoardData(CF_Bitmap, hBM);
  CloseClipBoard;
  SelectObject(hDestDC,hbmold);
  DeleteObject(hbm);
  DeleteDC(hDestDC);
  DeleteDC(hSourcDC);
end;