>I am in the process of redesigning the entire application. However, since I am the only one and it is very large and complicated, I can only do portions at a time. Thus the problem is it may take me several more months to a year to finish redesigning the rest. I do not want to wait that long to upgrade to VFP 7. I am just worried that some of the older code may fail if VFP 7 is not fully backword compatible to DOS version 2.6.
>
>Thanks,
>Lee Roy

Something else...
If you are talking FP for DOS then look out for some old commands that save and restore the screen (SAVE SCREEN TO myvar) It used to be about 4000 bytes but now is HUGE, and will gobble up memory.