部分一：根据屏幕已有信息获取帮助信息，填充到内表 
FORM get_batch .
   DATA l_stepl LIKE sy-stepl."Index of Current Step Loop Line
   DATA l_lgort TYPE ekpo-lgort.
   DATA l_matnr TYPE ekpo-matnr.
   DATA l_xchpf TYPE marc-xchpf.
   DATA l_dynpread TYPE STANDARD TABLE OF dynpread WITH HEADER LINE.
  " get the index of Current Step Loop Line 
   CALL FUNCTION 'DYNP_GET_STEPL'
     IMPORTING
       povstepl        = l_stepl     EXCEPTIONS
       stepl_not_found = 1
       OTHERS          = 2.


   l_dynpread-fieldname = 'WA_ITEM-MATNR'.
   l_dynpread-stepl = l_stepl.
   APPEND l_dynpread.
   CALL FUNCTION 'DYNP_VALUES_READ'
     EXPORTING
       dyname             = sy-repid
       dynumb             = sy-dynnr
       translate_to_upper = 'X'
     TABLES
       dynpfields         = l_dynpread.

   READ TABLE l_dynpread WITH KEY fieldname = 'WA_ITEM-MATNR'.
*  IF l_dynpread-fieldvalue IS INITIAL.
**   material number can not be empty
**    MESSAGE e005(z0303) .
*  ENDIF.
   l_matnr = l_dynpread-fieldvalue.


   CALL FUNCTION 'DYNP_GET_STEPL'
     IMPORTING
       povstepl        = l_stepl
     EXCEPTIONS
       stepl_not_found = 1
       OTHERS          = 2.


   l_dynpread-fieldname = 'WA_ITEM-LGORT'.
   l_dynpread-stepl = l_stepl.
   APPEND l_dynpread.
   CALL FUNCTION 'DYNP_VALUES_READ'
     EXPORTING
       dyname             = sy-repid
       dynumb             = sy-dynnr
       translate_to_upper = 'X'
     TABLES
       dynpfields         = l_dynpread.

   READ TABLE l_dynpread WITH KEY fieldname = 'WA_ITEM-LGORT'.
   IF l_dynpread-fieldvalue IS INITIAL.
*   material number can not be empty
*   MESSAGE e398(00) WITH 'Pleas select GI location before input batch'
*                           space space space.
   ENDIF.
   l_lgort = l_dynpread-fieldvalue.
   CLEAR*   i_mchb在之前已经填充的内表。这里也可以直接从数据库中获取需要的帮助信息。：select * into...
*     LOOP AT i_mchb INTO wa_mchb WHERE matnr EQ l_matnr
                               AND  werks EQ p_reswk
                               AND lgort EQ l_lgort
                               AND  clabs > 0.

     APPEND wa_mchb TO i_mchb_h.
   ENDLOOP.ENDFORM.                    " GET_BATCH
部分二：调用help的module.
MODULE sh_batch INPUT.

   PERFORM get_batch.

* data: t_return   like ddshretval occurs 0 with header line.sub_callback_batch
   CALL FUNCTION 'F4IF_INT_TABLE_VALUE_REQUEST'
     EXPORTING
       retfield    = 'CHARG'
       dynpprog    = sy-repid
       dynpnr      = sy-dynnr
       dynprofield = 'WA_ITEMS-CHARG'
       value_org   = 'S'
     TABLES
       value_tab   = i_mchb_h.
ENDMODULE.                 " SH_BATCH  INPUT 第三部分：在屏幕flow Logic中添加
process on value-request."帮助时触发
     field wa_item-charg module sh_batch. "需要帮助的字段