TO build ALV events

  *&---------------------------------------------------------------------*
*&      Form  build_alv_events
*&---------------------------------------------------------------------*
*       text
*----------------------------------------------------------------------*
*  -->  p1        text
*  <--  p2        text
*----------------------------------------------------------------------*
FORM build_alv_events TABLES prt_events.

  DATA: ldt_event TYPE slis_alv_event.

  CLEAR ldt_event.
  ldt_event-name = slis_ev_top_of_page.
  ldt_event-form = 'DISPLAY_ALV_HEADER'.
  APPEND ldt_event TO prt_events.

  ldt_event-name = slis_ev_end_of_list.
  ldt_event-form = 'DISPLAY_ALV_FOOTER'.
  APPEND ldt_event TO prt_events.

ENDFORM.                    " build_alv_events

*&---------------------------------------------------------------------*
*&      Form  DISPLAY_ALV_HEADER
*&---------------------------------------------------------------------*
*       text
*----------------------------------------------------------------------*
*  -->  p1        text
*  <--  p2        text
*----------------------------------------------------------------------*
FORM display_alv_header.

  DATA: ldf_pos   TYPE sylinsz,
        ldf_pagno(10) TYPE c.


  ldf_pos = sy-linsz - 20.
  WRITE sy-pagno TO ldf_pagno LEFT-JUSTIFIED.

  IF NOT gdt_listheader2[] IS INITIAL.
    CALL FUNCTION 'REUSE_ALV_COMMENTARY_WRITE'
      EXPORTING
        it_list_commentary = gdt_listheader2.
  ENDIF.

  IF NOT ldf_pagno IS INITIAL.
    WRITE: AT ldf_pos text-w01, ldf_pagno.
  ENDIF.

ENDFORM.                    " display_alv_header



  FORM display_alv_footer.

  DATA: ldf_linsz TYPE sylinsz,
        ldf_pos   TYPE i,
        ldf_len   TYPE i.

  ldf_linsz = sy-linsz.
  ldf_pos = ldf_linsz / 2.
  ldf_len = STRLEN( gdf_end_report ).
  ldf_len = ldf_len / 2.
  ldf_pos = ldf_pos - ldf_len.

  IF NOT gdt_listfooter2[] IS INITIAL.
    CALL FUNCTION 'REUSE_ALV_COMMENTARY_WRITE'
      EXPORTING
        it_list_commentary = gdt_listfooter2.
  ENDIF.

  IF NOT gdf_end_report IS INITIAL AND
    gdf_end_report <> space.
    SKIP.
    WRITE: AT ldf_pos gdf_end_report.
  ENDIF.

ENDFORM.