主窗体上用Image控件也是可以的。
否则就用Form的Canvas对象也行。见下面代码:
var
bmp:TBitmap;
procedure TForm1.FormCreate(Sender: TObject);
begin
bmp:=TBitmap.Create();
bmp.LoadFromFile('C:\Documents and Settings\user\桌面\000_0661.bmp');
canvas.Brush.Bitmap:=bmp;
end;
procedure TForm1.FormPaint(Sender: TObject);
begin
Canvas.FillRect(rect(0,0,width,height));
end;