private void GetAudioEndpointVolume()
{
object result;
deviceInterface.Activate(typeof(IAudioEndpointVolume).GUID, ClsCtx.ALL, IntPtr.Zero, out result);
audioEndpointVolume = new AudioEndpointVolume(result as IAudioEndpointVolume);
}
internal AudioEndpointVolumeCallback(AudioEndpointVolume parent)
{
this.parent = parent;
}