Modify toolbar for alv using CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY_LVC'

Question

Hi Experts,
I am using CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY_LVC' inside an exit.
I need to modify the tolbar with just three options :-
a-  add new row
b- delete rows
c- save data
Please guide me step by step as how to proceed as I am very new to ALV.
and after applying your solution to show the toolbar what should I do to Make these buttons working.
Thanks a lot for your replies in advance.
regards,
Udit

Answer 1

I'm not really sure why you would use an ALV grid display in a user exit.  I'm not sure how that works.  Another point is that the ALV object is really easier to use once you get used to it.
However:
Usually you would create a GUI status, and just add your buttons to it.  Then when the function module is called specify the gui status, and user command.
For example
v_repid = sy-repid.
w_user_command = 'USER_COMMAND'
w_set_status = "Status you define below.
  call function 'REUSE_ALV_GRID_DISPLAY'
    exporting
      i_bypassing_buffer       = 'X'
      i_callback_program       = w_repid
      i_callback_pf_status_set = w_set_status
      i_callback_user_command  = w_user_command
      is_layout                = w_layout
      i_structure_name         = 'ZGOODSMOVE'
    tables
      t_outtab                 = gt_outtab
    exceptions
      program_error            = 1
      others                   = 2.
  if sy-subrc <> 0.
    message e000 with 'Error in Displaying the Output Report'(025).
  endif.
Put your code for the different functions into one user function module
form user_command using r_comm like sy-ucomm
                        rs_selfield type slis_selfield.
  read table it_final1 index rs_selfield-tabindex.  " This will give you back the row you selected
  if sy-subrc = 0.
  endif.
endform.
To define the GUI Status:
Copy the status from
Then change it to add your fields