I'm exporting a method from a managed C++ DLL using __declspec(dllexport) so
that I can call it from a plain old C app.

This method takes as one of its arguments a void * that comes from the C
app. I store this void * in one of the members of my managed C++ class.  
Since the void * is from my C app, do I need to protect it in anyway from the
GC?

Thanks.

-Jason