Your application can register specific events to which the user can assign sound files so that when those events are triggered, the assigned sound file is played. To register a sound event, create a key under the HKEY_CURRENT_USER key.
HKEY_CURRENT_USER
AppEvents
Event Labels
EventName = Event Name
Set the value for EventName to a human-readable name.
Registering a sound event only makes it available in Control Panel so the user can assign a sound file. Your application must provide the code to process that event.