Modify screen in Module Pool

to modify screen in module pool
loop.
    module set_screen_0200.
 endloop.
*
module Set_screen_0200 output.
* break dkhansen.
  add 1 to g_index.
  loop at screen.
    case screen-name.
      when 'GI_WORK_LIKP-EAN_UPC'.
        if not GI_WORK_LIKP-EAN_UPC is initial.
          screen-input = '0'.
        endif.
    endcase.
*
    read table gi_work_likp index g_index.
    modify screen.
  endloop.
endmodule.

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