The ECI_GET_REPLY_WAIT call type provides a reply solicitation call to return information appropriate to any outstanding reply for any asynchronous request. If there is no such reply, the application waits until there is. (You can get an indication that no reply is available by using call type ECI_GET_REPLY instead.)
Same as for ECI_GET_REPLY, but eci_call_type must be set to ECI_GET_REPLY_WAIT.
Same as for ECI_GET_REPLY, except that ECI_ERR_NO_REPLY cannot be returned.