The DSBPOSITIONNOTIFY structure describes a notification position. It is used by IDirectSoundNotify8::SetNotificationPositions.


typedef struct DSBPOSITIONNOTIFY {
    DWORD dwOffset;
    HANDLE hEventNotify;


  • dwOffset
    Offset from the beginning of the buffer where the notify event is to be triggered, or DSBPN_OFFSETSTOP.
  • hEventNotify
    Handle to the event to be signaled when the offset has been reached.


The DSBPN_OFFSETSTOP value in the dwOffset member causes the event to be signaled when playback or capture stops, either because the end of the buffer has been reached (and playback or capture is not looping) or because the application called the IDirectSoundBuffer8::Stop or IDirectSoundCaptureBuffer8::Stop method.

>When a playback buffer was created with DSBCAPS_LOCDEFER and DSBCAPS_CTRLPOSITIONNOTIFY along with any voice management flag, it is possible that a sound that has notifications set, but not yet reached, will be terminated by the voice manager. In this case, no event is signaled.


Header: Declared in DSound.h.

See Also

Play Buffer Notification
Capture Buffer Notification