Re: selection screen issue

I see.. then you could use MODIFY SCREEN as your solution.

Ex : SELECT-OPTIONS : SO_DMDAT FOR SY-DATUM MODIF ID 'ABC'.

then AT SELECTION-SCREEN OUTPUT add your logic to hide or not :

LOOP AT SCREEN.

     IF SCREEN-GROUP1 EQ 'ABC'.

          IF {add your logic here whenever you want to hide or show}.

               SCREEN-INVISIBLE = 1. "HIDE

          ELSE.

          SCREEN-INVISIBLE = 0. "DISPLAY

          ENDIF.

          MODIFY SCREEN.

     ENDIF.

ENDLOOP.