Help!! Help ! VB COM server --> C++ COM Client

I am writing an application that uses both VB6 and C++. The tool is the COM object. I have no trouble making the following connection:
C++ (as server) --> VB6 (as client)
C++ (as server) --> C++ (as client)
VB6 (as server) --> VB6 (as client)

But then I just cannot do the VB6 as server-->C++ as client.
Even I use the MIDL compiler, the .idl file generated by VB cannot give me the .h file for my C++ client. How would I read the VB generated .dll or tlb files from C++ ???? HELP Please !!!