ABAP 控制 SAP Gui按钮的显示与不显示

*&--------------------------------------------------------------------- *
*&      FORM  G_STATUS_FORM 调用自定义屏幕
*&---------------------------------------------------------------------
FORM SET_PF_STATUS  USING RT_EXTAB TYPE SLIS_T_EXTAB.
  DATA lt_fcode TYPE TABLE OF sy-ucomm.
  REFRESH LT_FCODE.
  IF SUMFLG NE 'X'.
    APPEND '&CRTT' TO LT_FCODE.
    APPEND '&REL' TO LT_FCODE.
  ELSE.
    IF FLG NE 'X'.
      APPEND '&DSUM' TO LT_FCODE.
      APPEND '&REL' TO LT_FCODE.
    ELSE.
      APPEND '&DSUM' TO LT_FCODE.
      APPEND '&CRTT' TO LT_FCODE.
    ENDIF.
  ENDIF.

  SET PF-STATUS 'STANDARD' EXCLUDING lt_fcode.
*  SET PF-STATUS 'STANDARD' EXCLUDING EXCLTAB.
ENDFORM.                    "SET_PF_STATUS