VMS Help System Services, $SETSWM, Argument  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 swpflg

    OpenVMS usage:longword_unsigned
    type:         longword (unsigned)
    access:       read only
    mechanism:    by value
    Indicator specifying whether the process can be swapped. The
    swpflg argument is a longword value. The value 0 (the default)
    enables process swap mode, meaning the process can be swapped.
    The value 1 disables process swap mode, meaning the process
    cannot be swapped.