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

    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.