SAP ABAP: Capturing CHECK BOX event in FM REUSE_ALV_GRID_DISPLAY / Cell Editing
 
 Requirement:  Show total number of rows selected as message whenever a user      click on a check box column in REUSE_ALV_GRID_DISPLAY.   To accomplish this, we have to use EVENTS in REUSE_ALV_GRID_DISPLAY to capture changes made by the user.   In data declaration:  Data: gt_events  TYPE slis_t_event,          wa_events  TYPE slis_alv_event.  */------------------------------------------------------------------------   FORM display_alv_report.  */------------------------------------------------------------------------  gd_repid = sy-repid.  Refresh: gt_events.   wa_events-name = 'CALLER_EXIT'.  wa_events-form = 'CALLER_EXIT'.  APPEND wa_events TO gt_events.  wa_events-name = 'DATA_CHANGED'.  wa_events-form = 'DATA_CHANGED'.  APPEND wa_events TO gt_events.   CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'       EXPORTING            i_callback_program   ...