Note: This article applies to Visual C++ 6. There might be an easier way to do this in Visual Studio .NET

Something like this:

I just came across a problem where IEnumFoo::Next was returningRPC_X_NULL_REF_POINTER. Of course, the first thing that I did wasundertake a search in MSDN, and with Google to see if I could find anyexplanation of what the problem is.

The problem here is that you have a piece of IDL like this: