Montar matchcode asociado a una ayuda de búsqueda del diccionario de datos

  DATA search_name  LIKE rsrd1-shma_val VALUE 'AYUDA_DDIC'.
  DATA: it_matchcode LIKE TABLE OF ddshretval WITH HEADER LINE.

  REFRESH it_matchcode[].

  CALL FUNCTION 'F4IF_FIELD_VALUE_REQUEST'
    EXPORTING
      tabname    = ' '
      fieldname  = ' '
      searchhelp = search_name
    TABLES
      return_tab = it_matchcode.

  IF NOT it_matchcode IS INITIAL.
    READ TABLE it_matchcode INDEX 1.
    campo_dynpro = it_match-fieldval.
  ENDIF.