Correct use of sounds in triggers.

Hi,
I've got several questions about sounds. [and if there's s.th. special about them, please tell me]

1. Do I use 3D sounds for sounds, that are attached to a point / unit only?
2. How to play a sound attached to a unit with natives only.
3. How to clean up sounds after using them. When to use DestroySoundWhenDone() etc. / is it necessary to null local sounds?

1) Check GUI, if operation possible in GUI it OK.
2) PlaySound()
3) Sounds cannot be destroy, use permanent global sounds.

3D sounds can have their position set with some native (can't remember then name and at school). Something like SetSoundPosition() or AttachSoundToUnit().

Note: a sound can only be played once at a time. If you need sounds to play ontop, you need multiple sound handles. You can create and destroy sound handles on the fly, but you cannot create a sound handle in the same thread as you start it. You need to use a 0 second timer to play it after you create it.

It is better to make a stack of soundHandles and just draw from them than to dynamically create and destroy.

Thanks for answers. Helped a little ;P