Subj : DEFINE_GUID strange problem To : comp.programming From : Ufit Date : Wed Oct 12 2005 09:53 am I can't figure it out - doing this DEFINE_GUID(CLSID_MYCL,......); I always get an error 'error LNK2001: unresolved external symbol _CLSID_MYCL' Why is that - I got lot's of GUIDs in separate header which I include to my code. That's a standard windows header not modified. What is going on with the compiler? UF .