Bob,
If you've got that C++ source, together with either of the sample VC++ projects over on my website you should be able to get something up and running pretty quickly. The performance is going to be several orders of magnitude faster than any code that is being written in VFP alone.
>Once again, I've found C++ libraries which do exactly what I want <g> (do exponentiation and logarithms on 100+ digit numbers without errors and return the result as a string). Now I just need to find someone to convert them to a Windows DLL so that I can access from VFP.