Mmdevapi Audioendpoints Work -

State changes trigger IMMNotificationClient callbacks in applications.

IMMEndpoint* pEndpoint = nullptr; pDevice->QueryInterface(__uuidof(IMMEndpoint), (void**)&pEndpoint); EDataFlow flow; pEndpoint->GetDataFlow(&flow); // eRender or eCapture mmdevapi audioendpoints

The IAudioEndpointVolumeCallback interface provides notifications for audio endpoint volume changes. "Speakers (Realtek High Definition Audio)").

To document the internal workings, dependencies, and functional boundaries of MMDevAPI as it pertains to — logical representations of audio devices (e.g., "Speakers (Realtek High Definition Audio)"). mmdevapi audioendpoints