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

 addr
    A pointer to a sockaddr_in structure containing the internet
    address of the host where the remote Portmapper resides.
 prognum
    The program number associated with the remote procedure.
 versnum
    The version number associated with the remote procedure.
 procnum
    The procedure number associated with the remote procedure.
 inproc
    The XDR routine used to encode the remote procedure's arguments.
 in
    A pointer to the remote procedure's arguments.
 outproc
    The XDR routine used to decode the remote procedure's results.
 out
    A pointer to the remote procedure's results.
 timeout
    A timeval structure describing the time allowed for the results
    to return to the client.
 port
    A pointer to a location for the returned port number. Modified
    to the remote program's port number if the pmap_rmtcall routine
    succeeds.