exe work but dll does not work?

Hello everyone,


I have written two simple programs (source codes are the same),

1. In an exe, loading a class from another COM component by invoking CoCreateInstance;

2. In a COM DLL, loading a class from another COM component by invoking CoCreateInstance;

1 success but 2 fails. I am running in the same environment (machine) using Visual Studio 2005. Any ideas of this issue?


thanks in advance,
George

I work on a massive COM/DCOM project every day with dozens of DLLs containing COM components in VS2005.

First things first though. What is the return value of CoCreateInstance?