The TDI_EVENT_RECEIVE_EXPEDITED event is called to receive urgent data. It is nearly identical to the TDI_EVENT_RECEIVE event; the only difference between the two is that TDI_EVENT_RECEIVE receives only normal data and TDI_EVENT_RECEIVE_EXPEDITED receives only urgent data. The prototypes for the two event handlers are the same. Note that the two event handlers are not serialized by the transport.