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

    A macro that changes or retrieves information about an RPC client
    process.
    Format
      #include  <rpc/rpc.h>
      bool_t  clnt_control(CLIENT *handle, u_int code, char *info);

  Additional Information (explode) :

• Arguments
• Description
• Return Values