Sends a single message over a connection. This service is used
    in response to the reception of a Request Handle in a previous
    $ICC_RECEIVE system service.

    On Alpha and Integrity server systems, this service accepts 64-
    bit addresses.

    Format

      SYS$ICC_REPLY  conn_handle ,ios_icc ,[astadr] ,[astprm]

                     ,reply_buf ,reply_len

    C Prototype

      sys$icc_reply  (unsigned int conn_handle, struct _ios_icc

                     *ios_icc, void (*astadr)(__unknown_params),

                     __int64 astprm, char *reply_buf, unsigned int

                     reply_len);