ABAP Define select-option and parameter dynamically

You can define SELECT-OPTIONS & PARAMETERS dynamically.

Once you just try below code, you can get to know soon and easily.

DATA : name(20) TYPE c,

       nm(20) TYPE c.

SELECTION-SCREEN BEGIN OF SCREEN 500.

SELECT-OPTIONS : s_test  FOR (nm) NO-EXTENSION NO INTERVALS.

PARAMETERS p_carr LIKE (name).

SELECTION-SCREEN END OF SCREEN 500.

nm = 'VBAK-WAERK'.

name = 'VBAP-VRKME'.

CALL SELECTION-SCREEN 500.