>I thought you couldn't do callbacks in VFP6. Then I saw some stuff on the Wiki' site and Christof Lange has a 1997 function for VFP5. What's going on?

You can't do them with native VFP. Christof posted C++ code that can be used to write an fll that allows VFP functions to act on callbacks made toi that fll.

FWIW, until VFP does some major reworking of its memory management, VFP will not have an AddressOf function, and will not support CallBacks or any other thing that uses function pointers.