POH和POV事件获得屏幕字段的值

PROCESS ON HELP-REQUEST.
"当用户查看帮助信息时（或按下F1键）被触发、事件结束后将处理当前
	FIELD FIELD_NAME MODULE HELP_MODULE.	屏幕
PROCESS ON VALUE-REQUEST.
"当用户按下查询帮助按键时（或按下F4键）被触发，事件结束后将继续处
	FIELD FIELD_NAME MODULE F4_MODULE.	理当前屏幕

  DATA:DYNPFIELDS  TYPE TABLE OF DYNPREAD WITH HEADER LINE.
  DYNPFIELDS-FIELDNAME = 'FIELD_1'.
  APPEND  DYNPFIELDS.
  CALL FUNCTION 'DYNP_VALUES_READ'
    EXPORTING
      DYNAME     = SY-REPID
      DYNUMB     = SY-DYNNR
    TABLES
      DYNPFIELDS = DYNPFIELDS.
  IF SY-SUBRC =  0.
    READ TABLE DYNPFIELDS WITH   KEY  FIELDNAME   = 'FIELD_1'.
    IF SY-SUBRC = 0.
      ZMMT001-WERKS =   DYNPFIELDS-FIELDVALUE.
    ENDIF.
  ENDIF.