函数：F4IF_GET_SHLP_DESCR

        F4IF_START_VALUE_REQUEST

效果图：

本例子代码：

找到需要的帮助:

*& Report  ZLM_TEST_045

REPORT  zlm_test_045.

TABLES makt.

DATA:

      BEGIN OF str_f4,

        matnr TYPE matnr,

        maktx  TYPE maktx,

        END OF str_f4.

DATA:l_it_f4 LIKE TABLE OF str_f4.

SELECTION-SCREEN BEGIN OF BLOCK b1 WITH FRAME TITLE text-t01.

SELECT-OPTIONS:

           s_matnr  FOR makt-matnr NO INTERVALS.

SELECTION-SCREEN END OF BLOCK b1.

"帮助

AT SELECTION-SCREEN ON VALUE-REQUEST FOR s_matnr-low.

  SELECT * FROM makt INTO CORRESPONDING FIELDS OF TABLE l_it_f4.

  PERFORM frm_f4."  USING 'S_MATNR-LOW' .

*&-------------------------------------------------------------------

*& 搜索帮助

*&-------------------------------------------------------------------

FORM frm_f4.

  DATA g_shlp_descr_t             TYPE shlp_descr_t.

  DATA gwa_shlp_descr_t_interface TYPE ddshiface.

  DATA: gt_return_tab   TYPE TABLE OF ddshretval WITH HEADER LINE.

"调用标准帮助

  CALL FUNCTION 'F4IF_GET_SHLP_DESCR'

    EXPORTING

      shlpname = 'MAT1W'

      shlptype = 'SH'

    IMPORTING

      shlp     = g_shlp_descr_t.

  LOOP AT g_shlp_descr_t-interface INTO gwa_shlp_descr_t_interface.

    IF gwa_shlp_descr_t_interface = 'MATNR'.

      gwa_shlp_descr_t_interface-valfield = 'X'.

      MODIFY g_shlp_descr_t-interface FROM gwa_shlp_descr_t_interface.

    ENDIF.

  ENDLOOP.

  CALL FUNCTION 'F4IF_START_VALUE_REQUEST'

    EXPORTING

      shlp          = g_shlp_descr_t

      maxrecords    = 500

      multisel      = 'X'

    TABLES

      return_values = gt_return_tab.

  "获取选中值 可以多选 拥有select options

  LOOP AT gt_return_tab.

    s_matnr-sign = 'I'.

    s_matnr-option = 'EQ'.

    s_matnr-low = gt_return_tab-fieldval.

    APPEND s_matnr.

  ENDLOOP.

ENDFORM.                    " FRM_F4

另外一个F4增强的例子，也是添加筛选字段：

http://blog.sina.com.cn/s/blog_c0978c9b0101h1qf.html