Hi,
First get the line number of the table control using the FM 'DYNP_GET_STEPL' and store it in g_stepl .
Then pass g_stepl against stepl parameter of FM 'F4_INT_TABL_VALUE_REQUEST'.
DATA: g_stepl type sy-stepl
CALL FUNCTION 'DYNP_GET_STEPL'
IMPORTING
povstepl = g_stepl
EXCEPTIONS
stepl_not_found = 1
OTHERS = 2.
IF sy-subrc IS INITIAL.
* Display search help from the internal table
CALL FUNCTION 'F4IF_INT_TABLE_VALUE_REQUEST'
EXPORTING
retfield = 'GRADE'
dynpprog = sy-repid
dynpnr = sy-dynnr "'0100
dynprofield = 'ITAB-GRADE'
stepl = g_stepl
value_org = 'S'
TABLES
value_tab = it_grade
return_tab = it_return.
EXCEPTIONS
parameter_error = 1
no_values_found = 2
OTHERS = 3.
Regards,
DPM