>Is there a class out there that will convert datatypes from vfp to standard dll/(c/c++) datatypes. For instance...
>
>ulong
>pStr
>etc...
>

What do you need to do? Simple data types declared via DECLARE DLL are converted by VFP for you; you need to know a good deal more to handle structures and pointers. You might want to look at Paul Tatavu's POINTERS class and my CLSHEAP class, which both provide mechanisms for doing some of the conversions and allocations needed to interface C-style .DLLs with VFP.