how to call selection screen before smartforms?

Hi experts,

I wanna call a selection screen before displaying smartforms. In NACE transaction, I have program that calls the smartforms and In that program, I wanna add a selection screen with three fields whom values comes from a value range that prepared by me. I don't wanna use popup selection FM's because as ,I said, I wanna display the values according to a value range.

Do you know any way to do this?