其中message class是在se91里创建的
call function 'BAPI_MESSAGE_GETDETAIL'
exporting
id = msg_class “message class
number = msg_no “message number
language = sy-langu
textformat = 'ASC'
message_v1 = bapireturn-message_v1
message_v2 = bapireturn-message_v2
message_v3 = bapireturn-message_v3
message_v4 = bapireturn-message_v4
importing
message = bapireturn-message
tables
text = lt_text.
