class CNotificationClient : public IMMNotificationClient public: STDMETHODIMP OnDeviceStateChanged(LPCWSTR pwstrDeviceId, DWORD dwNewState) if (dwNewState == DEVICE_STATE_UNPLUGGED) // Notify UI to disable output
Identifies the data flow direction.
(Excerpt showing device state change handling) mmdevapi audioendpoints
The MMDevAPI AudioEndpoints feature provides three main capabilities to applications: mmdevapi audioendpoints
Each endpoint has a state: