title: Get selection value in ALV grid
body: <p>I want to get the value of the select cells in ALV, I tried <code>get_selected_cells</code> method, but the value field is INITIAL.</p>
  
  <p>What's wrong in this method?</p>
  
  <pre><code>FORM delete_livraison .
    DATA: lt_cells  TYPE lvc_t_cell,
          ls_cells  TYPE lvc_s_cell,
          lv_probl  TYPE xfeld.
  
    gr_alvpl-&gt;get_selected_cells(  IMPORTING et_cell = lt_cells ).
  
    LOOP AT lt_cells INTO ls_cells.
      IF ls_cells-col_id+0(3) NE 'DAY'.
  *      lv_probl = 'X'.
      ENDIF.
      IF ls_cells-value IS INITIAL.
        lv_probl  = 'X'.
      ENDIF.
    ENDLOOP.
  
    IF lv_probl EQ 'X'.
      MESSAGE s029 DISPLAY LIKE 'E'.
    ENDIF.
  ENDFORM.
  </code></pre>
  
  <p>Thanks.</p>