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

 pasteboard-id

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

    Specifies the keyboard (associated with the specified pasteboard)
    for which unsolicited input is being disabled. The pasteboard-id
    argument is the address of an unsigned longword that contains the
    pasteboard identifier.

    The pasteboard identifier is returned by SMG$CREATE_PASTEBOARD.