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

    A macro that calls a remote procedure.
    Format
      #include  <rpc/rpc.h>
      enum clnt_stat  clnt_call(CLIENT *handle, u_long procnum,
                      xdrproc_t inproc, char *in, xdrproc_t outproc,
                      char *out, struct timeval timeout);

1 - Arguments

 handle
    A pointer to a client handle created by any of the client handle
    creation routines.
 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 structure describing the time allowed for results to return to
    the client. If you have previously used the clnt_control macro
    with the CLSET_TIMEOUT code, this value is ignored.

2 - Description

    Use the clnt_call macro after using one of the client handle
    creation routines. After you are finished with the handle, return
    it using the clnt_destroy macro. Use the clnt_perror to print any
    errors that occurred.

3 - Return Values

    RPC_SUCCESS        Indicates success.
    clnt_stat          Returns the buffer of type enum clnt_stat
                       containing the status of the clnt_call
                       operation.