调用资源文件,该如何解决

调用资源文件
我编了一个资源文件，是（1）这样，我用(2)和（3）两种方法调用，请问为什么第一种方法不行啊？提示找不到MyJpg，为什么啊？第二种只是用了try和finally和end啊
如果要第一种可用，改怎么改，不要用try方法，谢谢
(1)MyJpg   JPEG　My.JPG
(2)var
jpg:   TJPEGImage;
resStream:   TResourceStream;
begin
resStream:=TResourceStream.Create(HInstance,   'MyJpg ',   'JPEG ');
jpg   :=   TJPEGImage.Create;
jpg.LoadFromStream(resStream);
Image1.Picture.Assign(jpg);
jpg.Free;
resStream.Free;
end;

(3)Var
Stream:TStream;
MyJpg:TJpegImage;
Begin
Stream:=TResourceStream.Create(HINSTANCE, 'MyJpg ', 'JPEG ');
Try
MyJpg:=TJpegImage.Create;
Try
MyJpg.LoadfromStream(Stream);
Image1.Picture.Assign(MyJpg);
Finally
MyJpg.Free;
end;
Finally
Stream.Free;
end;
end;

[解决办法]
//测试可以啊！
{$R MyJpg.res} // 注意资源文件要引用

uses jpeg;

procedure TForm1.Button1Click(Sender: TObject);
var
jpg: TJPEGImage;
resStream: TResourceStream;
begin
resStream:=TResourceStream.Create(HInstance, 'MyJpg ', 'JPEG ');
jpg := TJPEGImage.Create;
jpg.LoadFromStream(resStream);
Image1.Picture.Assign(jpg);
jpg.Free;
resStream.Free;
end;