step1:在SELECTION-SCREEN中定义SUBSCREEN
SELECTION-SCREEN BEGIN OF SCREEN 0101 AS SUBSCREEN.
SELECT-OPTIONS S_XMGS FOR ZTPO0074-XMGS .
SELECTION-SCREEN END OF SCREEN 0101.
STEP2: 引用SUBSCREEN
关键字 CALL SUBSCREEN SUBSCR_0100 INCLUDING SY-REPID '子屏幕编号'.
step3: 捕捉子屏幕ok_code触发功能码对应事件