Different sounds depending on surfaceprop?

[I'm great]

I'm coding a melee swep, and I want it to have different sounds when hit something.
For example, play a sound when hit wood, and play another one when hit metal.
I only need a line for surfaceprop, nothing else.

[Netheous]

[url]http://wiki.garrysmod.com/page/Structures/TraceResult[/url]