/sys$common/syshlp/helplib.hlb FORTRAN, Statements, INQUIRE, FORM  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  FORM = fm

  fm  Is a character scalar memory reference that is
      assigned one of the following values:

  'FORMATTED'     If the file is open for formatted I/O
  'UNFORMATTED'   If the file is open for unformatted I/O
  'UNKNOWN'       If no connection exists