>Hi Victor,
>
> Thanks. This is working fine. But i don't know whether i have used these columns anywhere in my program. this will give me error at that time so i am looking for any other solutions.
>
>Regards
>Amit

AFAIK there are no other solutions for what you are trying to accomplish using native VFP Grids. What I do is regenerate the columns (with addobject() )when they are needed and make all my calculations using the underliying table and not the columns values.

HTH