delphi 2010 播放GIF动画

unit Unit1;
interface
uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, ExtCtrls;
type
  TForm1 = class(TForm)
    Main1: TImage;
    btn1: TButton;
procedure btn1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
  Form1: TForm1;
implementation
uses GIFImg; //一定要加这个不然编译通不过
{$R *.dfm}
procedure TForm1.btn1Click(Sender: TObject);
begin
    Main1.Picture.LoadFromFile('E:\344.gif');
    TGIFImage(Main1.Picture.Graphic).AnimationSpeed := 100;
    TGIFImage(Main1.Picture.Graphic).Animate := True;
end;