VMS Help RTL Routines, LIB$, LIB$FIND_FILE_END, Argument  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 context

    OpenVMS usage:context
    type:         longword (unsigned)
    access:       read only
    mechanism:    by reference

    Zero or the address of a FAB/NAM buffer from a previous call to
    LIB$FIND_FILE. The context argument is the address of a longword
    that contains this context.