Sales Order Doc Status Text Function Module

Sales Order 문서 조회 하다 보면 테이블 값과 실제 문서조회 화면과는 

상이한 출력 Text가 보이는데 이건 따로 펑션이 존재 하더라~~

*&---------------------------------------------------------------------*
*&      Form  RV_DOCUMENT_STATUS_TEXTS
*&---------------------------------------------------------------------*
*       text
*----------------------------------------------------------------------*
*      -->P_SY_MANDT  text
*      -->P_SY_LANGU  text
*      -->P_0341   text
*      -->P_0342   text
*      -->P_LT_SO_LIST_GBSTK  text
*      <--P_ET_SO_LIST_GBSTK  text
*----------------------------------------------------------------------*
FORM RV_DOCUMENT_STATUS_TEXTS  USING    PV_MANDT
                                        PV_LANGU
                                        PV_TABNAME
                                        PV_FIELDNAME
                                        PV_VALUE
                               CHANGING PV_TEXT.

  DATA : LS_INPUT TYPE TVBST.
  DATA : LV_TEXT  TYPE TVBST-BEZEI.

  CLEAR LS_INPUT.
  LS_INPUT-MANDT = PV_MANDT.      "CLIENT
  LS_INPUT-SPRAS = PV_LANGU.       "LANGU
  LS_INPUT-TBNAM = PV_TABNAME.  "Table Name (VBUK)
  LS_INPUT-FDNAM = PV_FIELDNAME.
  LS_INPUT-STATU = PV_VALUE.

  CALL FUNCTION 'RV_DOCUMENT_STATUS_TEXTS'
    EXPORTING
      TVBST_WA = LS_INPUT
    IMPORTING
      TEXT     = LV_TEXT.

  PV_TEXT = LV_TEXT.

ENDFORM.                    " RV_DOCUMENT_STATUS_TEXTS