IGES to XDE

Hi,

I try to obtain the colors from a IGES file. First I read the IGES file using IGESCAFControl_Reader,
but there is a error of debugging when I try to transfer le Doc(type of Handle(TDocStd_Document)).I use Visual Studio 2005

code
=====================================
IGESCAFControl_Reader Reader;
Reader.ReadFile("bearing.iges");

Handle(TDocStd_Document) Doc;
Reader.Transfer(Doc);

=====================================

Does somebody have an idea to help me?

Thank you in advance

Regards
Yilin