Soykan,

You'll need to populate the RecordSource with a value that is doing the sum, which can be calculated in a scan loop:

lnTotal = 0
scan
   lnTotal = lnTotal + ColA
   replace ColB with lnTotal
endscan

>i have workbook on MSexcel like under
>
> A B

     produced   cumulativeproduced
1    100        100
2    50         150    && formula B1+A2
3    200        350     && formula B2+A3

>..
>..
>..
>
>i wantto this calculation in grid how can i do this ?