ABAP-选择屏幕

SELECTION-SCREEN BEGIN OF BLOCK BK1 WITH FRAME TITLE TEXT-001.
  "PARAMETERS: P_PONUM TYPE ZTPOLINE_CPF-PONUM.
  SELECT-OPTIONS: S_MAT FOR ZTPOLINE_CPF-POMATERIAL NO-EXTENSION NO INTERVALS,
                  S_PONUM FOR ZTPOLINE_CPF-PONUM.
SELECTION-SCREEN END OF BLOCK BK1 .