The RTCEF_SESSION_REFER_STATUS event is fired to the application that initiates a session transfer on a connected call by calling the IRTCSessionCallControl::Refer method. This event notifies the application of the status of the call being created between the transferred endpoint and the transfer target endpoint.
To enable reception of session refer status events, the application must call the IRTCClient::EventFilter method and set an event filter mask that includes the RTCE_SESSION_REFER_STATUS event.
If the application does not call IRTCClient::EventFilter, it will not receive events.