We can provide custom F4 help for any input fields on selection screen using the function module F4IF_INT_TABLE_VALUE_REQUEST in AT SELECTION-SCREEN ON VALUE-REQUEST FOR field event.
TYPES: BEGIN OF ty_matnr,
matnr TYPE makt-matnr,
maktx TYPE makt-maktx,
END OF ty_matnr.
*--------------------------------------------------------------*
*Data Declaration
*--------------------------------------------------------------*
DATA: gwa_matnr TYPE ty_matnr,
gt_matnr TYPE TABLE OF ty_matnr.
DATA: gt_return TYPE TABLE OF ddshretval,
gwa_return TYPE ddshretval.
*--------------------------------------------------------------*
*Selection-Screen
*--------------------------------------------------------------*
PARAMETERS: p_matnr TYPE mara-matnr.
*--------------------------------------------------------------*
*Selection-Screen on Value-Request
*--------------------------------------------------------------*
AT SELECTION-SCREEN ON VALUE-REQUEST FOR p_matnr.
REFRESH gt_matnr.
gwa_matnr-matnr = 'AAA'.
gwa_matnr-maktx = 'Dummy Material 1'.
APPEND gwa_matnr TO gt_matnr.
gwa_matnr-matnr = 'BBB'.
gwa_matnr-maktx = 'Dummy Material 2'.
APPEND gwa_matnr TO gt_matnr.
gwa_matnr-matnr = 'CCC'.
gwa_matnr-maktx = 'Dummy Material 3'.
APPEND gwa_matnr TO gt_matnr.
CALL FUNCTION 'F4IF_INT_TABLE_VALUE_REQUEST'
EXPORTING
retfield = 'MATNR'
value_org = 'S'
TABLES
value_tab = gt_matnr
return_tab = gt_return
EXCEPTIONS
parameter_error = 1
no_values_found = 2
OTHERS = 3.
READ TABLE gt_return INTO gwa_return INDEX 1.
IF sy-subrc = 0.
p_matnr = gwa_return-fieldval.
ENDIF. Selection Screen Output
