Hi Venkat, i am doing this by calling a driver program associated with it, i have declared my fields
as it_item-pre_menge, it_item-pre_amnt.....etc for all the three field( PREVIOUS BILL, CURRENT BILL, CUMULATIVE BILL).
Could you sujjest me how can i write code in my smartforms to check the entries in all the three fields, and then to assign space for the variables whom i wish to be empty, (when all the three fields contain blank values, then the fields corresponding to it gets disabled)