请高手指教，憋了3天了呀！(2分)

在fast report中打印图形，格式分别为JPG和BMP，怎么写语句控制BlobType 的属性值

Fjpg :=TJpegImage.Create ;
fstream:=Tmemorystream.create;
fstream.LoadFromFile(buffer+'/'+table1xh.AsString +'.jpg');
FJpg.LoadFromStream (FStream) ;
dbimage1.Picture.Bitmap.Assign (FJpg);
fstream.Free;
Fjpg.Free;

这组语句写在哪里呀？谢谢