在新窗口中打开T-CODE

方法1：
CALL FUNCTION 'ABAP4_CALL_TRANSACTION'
  STARTING NEW TASK 'A'
  EXPORTING
    TCODE                         = 'MM01'
*   SKIP_SCREEN                   = ' '
*   MODE_VAL                      = 'A'
*   UPDATE_VAL                    = 'A'
* IMPORTING
*   SUBRC                         =
* TABLES
*   USING_TAB                     =
*   SPAGPA_TAB                    =
*   MESS_TAB                      =
* EXCEPTIONS
*   CALL_TRANSACTION_DENIED       = 1
*   TCODE_INVALID                 = 2
*   OTHERS                        = 3

          .

方法2：

CALL FUNCTION 'NAVIGATION_EXECUTE_OBJECT'
  EXPORTING
    OBJECT_NAME           = 'MM01' "T-CODE
    REPORTTYPE            = 'TR' " Transaction
    SAP_GUID              = ' '
    NEW_WINDOW            = 'X'
    NO_PROGRESS_INDICATOR = 'X'
    REPLACE_RFC_VARIABLES = 'X'.