>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?

How big of numbers do you need?

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.

UPDATE: In fact, in thinking about it, I think I wrote a VFP wrapper at one point. Hmm...