AT SELECTION-SCREEN ON HELP REQUEST FOR field

This event is triggered when the user hits F1 on the field in a selection screen. This event gets triggered at the POH of the selection screen.

REPORT ztest.

PARAMETERS: p_carrid(2) TYPE c.

DATA: it_f1help TYPE STANDARD TABLE OF helpval WITH HEADER LINE.

AT SELECTION-SCREEN ON HELP-REQUEST FOR p_carrid.

CLEAR it_f1help[].

it_f1help-tabname = 'TEXT1'.
it_f1help-fieldname = 'p_carrid'.
it_f1help-keyword = 'Short Text'.
it_f1help-length = 50.
it_f1help-value = 'Enter A Valid Carrier ID, e.g. SJ, AI, KF, etc.'.

 APPEND it_f1help.


CALL FUNCTION 'HELP_GET_VALUES'
EXPORTING
  popup_title = 'CARRIER ID'
TABLES
  fields = it_f1help
EXCEPTIONS
  no_entries = 1
  OTHERS = 2.

IF sy-subrc <> 0.
  MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
  WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
ENDIF.

OUTPUT:

On pressing ‘F1’ Help Button on the field,