I think all he wants is

replace fld3 with fld1+fld2 ALL

>>Dear Sir,
>>
>>Your codes still not work
>>
>>It replies the sum of fld1+fld2 and there is no runing total
>>
>>Please modify codes again
>
>Yes, it works according to what you asked for, I guess you did not explain well enough. Try this, and see for yourself

>Create Cursor tariq (fld1 n(5), fld2 n(5), fld3 n(5))
>Insert into tariq (fld1, fld2) values (1,2)
>Insert into tariq (fld1, fld2) values (6,8)
>Insert into tariq (fld1, fld2) values (3,7)
>Insert into tariq (fld1, fld2) values (0,3)
>lnTotal = 0
>Scan
>  Replace fld3 with lnTotal + fld1 + fld2
>  lnTotal = fld3
>EndScan
>browse