該例子是將YFKJE的欄位的不可編輯屬性修改為可編輯狀態，其實就是將fieldcat的fieldname為YFKJE即這一列，修改其EDIT屬性

    LOOP AT fieldcat WHERE fieldname = 'YFKJE'.
      fieldcat-edit          = 'X'.
      MODIFY fieldcat TRANSPORTING edit.
    ENDLOOP.
    PERFORM frm_alv_display.
    *&---------------------------------------------------------------------*
 

*&      Form  FRM_ALV_DISPLAY
*&---------------------------------------------------------------------*
*       text
*----------------------------------------------------------------------*
*  -->  p1        text
*  <--  p2        text
*----------------------------------------------------------------------*
 

FORM frm_alv_display .
  CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY_LVC'
    EXPORTING
      i_callback_program       = sy-repid
      i_callback_user_command  = 'USER_COMMAND'
      i_callback_pf_status_set = 'PF_STATUS'
      is_layout_lvc            = wa_layout
      it_fieldcat_lvc          = fieldcat[]
      i_default                = 'X'
 

      i_save                   = 'A'
      it_sort_lvc             = i_sort[]
     it_events                = gt_events
    TABLES
      t_outtab                 = gt_display[]
    EXCEPTIONS
      OTHERS                   = 2.
  IF sy-subrc <> 0.
  ENDIF.
ENDFORM.