If it is a big deal, maybe you should look at writing the > routines in 'C' (possibly still keeping your FoxPro shell). Peter, Assuming you checked the rest of the stuff Joseph and other mentioned do consider that "Number crunching" is not exactly VFP's prime feature.. thus if there are heavy calculation a VC++ DLL to do the mathematic stuff called by a VFP program that prepares the data for it is the best solution in many cases Arnon