Hi, you need to specify the cooerative level to determine how DirectSound should behave if more than one instance of DirectSound is running at the same time.  This behavior is related to the focus, and the focus is 'linked' to a visible item. You might try to use just zero as the handle. Tomy

Hi, I'm facing a strange problem related to the notification mechanism of DirectSoundBuffer8, which occurs only on vista(R)  There are no events 'fired' for the playback, capture is working fine. The stuff works on 98SE/2k/XP without problems. I tried creating the buffers either via split creation (DirectSound8Create & ...