How to get editable data into internal table

Hi ABAPers,
I am displaying REUSE_ALV_GRID_DISPLAY report with one editable field and i have post button in report. Once i select post button i need to get editable data to internal table which i passed to REUSE_ALV_GRID_DISPLAY.
actually i am writing below code but data is not coming to internal table.
CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
   EXPORTING
     i_callback_program                          = sy-repid
     i_callback_pf_status_set                  = 'PF-STATUS'
     i_callback_user_command               = 'USER_COMMAND '
     it_fieldcat                                        = t_field[]
     i_default                                          = 'X'
    TABLES
      t_outtab                          =   <fs_display1>.       "t_display
FORM user_command USING g_ucomm LIKE sy-ucomm
               rs_selfield TYPE slis_selfield.
g_test1 = g_ucomm.
CASE g_ucomm.
    WHEN 'POST'.
      READ TABLE <fs_display1> ASSIGNING <fsw_display1> INDEX 1.    "Just for testing index 1
      IF sy-subrc = 0.
        w_display = <fsw_display1>.
        APPEND w_display TO t_display.
        CLEAR : w_display.
      ENDIF.
      PERFORM v1.
      PERFORM bapi_call.
ENDCASE.
ENDFORM.                    "USER_COMMAND
Please help me how to get.
Regards,
Raju.

Hi,
Try the following:
CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
EXPORTING
i_callback_program = sy-repid
i_callback_pf_status_set = 'PF-STATUS'
i_callback_user_command = 'USER_COMMAND '
it_fieldcat = t_field[]
i_default = 'X'
TABLES
t_outtab = <fs_display1>. "t_display
FORM user_command USING g_ucomm LIKE sy-ucomm
rs_selfield TYPE slis_selfield.
g_test1 = g_ucomm.
CASE g_ucomm.
WHEN 'POST'.
* to reflect the data changed into internal table
      DATA : ref_grid TYPE REF TO cl_gui_alv_grid. "new
      IF ref_grid IS INITIAL.
        CALL FUNCTION 'GET_GLOBALS_FROM_SLVC_FULLSCR'
          IMPORTING
            e_grid = ref_grid.
      ENDIF.
      IF NOT ref_grid IS INITIAL.
        CALL METHOD ref_grid->check_changed_data.
      ENDIF.
READ TABLE <fs_display1> ASSIGNING <fsw_display1> INDEX 1. "Just for testing index 1
IF sy-subrc = 0.
w_display = <fsw_display1>.
APPEND w_display TO t_display.
CLEAR : w_display.
ENDIF.
PERFORM v1.
PERFORM bapi_call.
ENDCASE.
ENDFORM. "USER_COMMAND
Hope it helps.
Regards,
Gilberto Li

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