"自定义表ZTZRPS002_N1读取是否上次存储过打印之后的数据
        IF SY-SUBRC <> 0.
          gth_header-PRINTDATE = SY-DATUM."没有被打印过，设置为当前日期
        ENDIF.

   DATA:v_output_info TYPE ssfcrescl,
        v_output_options TYPE ssfcompop,
        v_PRINT_COUNT(3) TYPE c.
        v_output_options-tdiexit = 'X'."（这个参数一定要传，这样在smartform预览界面点后退按钮后，下面的传出参数v_output_info-outputdone不会被赋值）
        CALL FUNCTION 'SSF_FUNCTION_MODULE_NAME'
          EXPORTING
            FORMNAME = 'ZPSF002_N1'
          IMPORTING
            FM_NAME  = GWK_FNAME.

        CALL FUNCTION GWK_FNAME
          EXPORTING
            OUTPUT_OPTIONS   = v_output_options
          IMPORTING
            JOB_OUTPUT_INFO  = v_output_info
          EXCEPTIONS
            FORMATTING_ERROR = 1
            INTERNAL_ERROR   = 2
            SEND_ERROR       = 3
            USER_CANCELED    = 4
            OTHERS           = 5.

        IF SY-SUBRC = 0.  "SMARTFORM执行之后，执行此处代码
          IF v_output_info-outputdone = 'X'.“判断是否是真正的进行过打印，是的话将数据存储到数据表中
            LOOP AT   gtd_header INTO gth_header .
              SELECT SINGLE PRINTDATE INTO gth_header-PRINTDATE  FROM  ZTZRPS002_N1
             WHERE RSNUM = gth_header-RSNUM AND AUFNR = gth_header-AUFNR AND VORNR = gth_header-VORNR AND PSPID = gth_header-PSPID AND POSID =  gth_header-POSID .
              IF SY-SUBRC <> 0.
                ITAB_WA-RSNUM = gth_header-RSNUM.
                ITAB_WA-AUFNR = gth_header-AUFNR.
                ITAB_WA-VORNR = gth_header-VORNR.
                ITAB_WA-PSPID = gth_header-PSPID.
                ITAB_WA-POSID = gth_header-POSID.
                ITAB_WA-PRINTDATE = SY-DATUM.
                MODIFY ZTZRPS002_N1  FROM ITAB_WA.
              ENDIF.            ENDLOOP.