Welcome to the MSVBVM60 WikiEdit
Finally, a wiki dedicated to breaking down Microsoft's infamous Visual Basic 6.0 runtime! I haven't found many reliable reverse engineering references on this topic yet so I hope this helps.
There are little bits and pieces of information about the internals of the Visual Basic 6.0 Runtime scattered all around the internet in the remnants of old geocities cites, forums, and discussion groups. If you're lucky, you'll find the prototype of the function you're looking for, but usually there's almost no information to be found. I'd like to see a place with some good coverage of at least the definitions of most of the runtime, if not explanations of how data is manipulated and passed around internally, and hopefully this can be it. Initially, this is basically just a personal reference, but I'd love to see some contributions. I hope some day someone might find it handy for their reverse engineering needs.