The IDirectMusicSegment::RemoveNotificationType method is similar to and called from the IDirectMusicPerformance::RemoveNotificationType method, allowing the segment to remove notifications. The segment calls each track's IDirectMusicTrack::RemoveNotificationType method.
HRESULT RemoveNotificationType(
  REFGUID rguidNotificationType
);
 If the method succeeds, the return value is S_OK.
If it fails, the method may return E_POINTER.
  Windows NT/2000: Requires Windows 2000.
  Windows 95/98: Requires Windows 95 or later. Available as a redistributable for Windows 95.
  Header: Declared in dmusici.h.