Hi Kripa,
Thanks for the reply. I did it like this..
MODULE edit_column_display OUTPUT.
DATA : lv_line(48) TYPE c,
lv_field(18) TYPE c VALUE 'EXTRACT-LINE+23(1)'.
FIELD-SYMBOLS: <fs_value> TYPE char1.
ASSIGN (lv_field) TO <fs_value>.
* IF sy-ucomm = 'CHECK'.
"lv_line = ( 'EXTRACT-LINE' ).
LOOP AT SCREEN.
IF screen-name = 'ZTSD017_BILL_PLN-TO_DATE' AND
<fs_value> = 'X'.
"( 'EXTRACT-LINE+23(1)' ) = 'X'.
screen-input = '0'.
ELSE.
screen-input = '1'.
ENDIF.
MODIFY SCREEN.
ENDLOOP.
* ENDIF.
ENDMODULE.