>>I am struggling implementing a code that would be able to add large numbers. Basically it is working, I am using the Math_unlimited.vcx from the download section. However once the result would be negative it gives wrong results. I would need to rewrite the code, but I was wondering if someone has a better code for this, or perhaps even an fll solution that could be used instead?
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>How big of numbers do you need?
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>I wrote an open source arbitrary precision math library that used MPFR several years ago in C/C++. It could be ported to an FLL with little difficulty. It provided basic trig functions, exponents, roots, etc.
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>UPDATE: In fact, in thinking about it, I think I wrote a VFP wrapper at one point. Hmm...

I have numbers that come close to 20 digits, no decimals, but could get negative. Actually it's for calculating hash codes for bank files, which is a relatively general task.