LoopSoundUntilNext Property Example
This example specifies that the file Dudududu.wav will start to play at the transition to slide two in the active presentation and will continue to play until the next sound starts.
With ActivePresentation.Slides(2).SlideShowTransition
.SoundEffect.ImportFromFile "c:\sndsys\dudududu.wav"
.LoopSoundUntilNext = True
End With