VMS Help TCPIP Services, Programming Interfaces, RPC Portmapper Routines, pmap_set  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Called by the server procedure to have the Portmapper create a
    mapping of the procedure's program and version number.
    Format
      #include  <rpc/pmap_clnt.h>
      bool_t  pmap_set(u_long prognum, u_long versnum, u_long
              protocol, u_short port);

1 - Arguments

 prognum
    The program number associated with the server procedure.
 versnum
    The version number associated with the server procedure.
 protocol
    The transport protocol that the server procedure uses. Specify
    either IPPROTO_UDP or IPPROTO_TCP.
 port
    The port number associated with the server program.

2 - Description

    A server interface to the Portmapper, which establishes a mapping
    between the triple [prognum,versnum,protocol] and port on the
    server's Portmapper service. The svc_register routine calls this
    routine to register the server with the local Portmapper.

3 - Return Values

    TRUE               Indicates success.
    FALSE              Indicates failure.