Quitting XFCE

It's a pretty simple question, and I'm sure it has a simple solution. I would like use the the XFCE built-in command "quit" to exit. The this is that since it's a built-in command, it can only (at least that's what it seems like) be involked by the XFCE menu, but I don't want to use the menu to run the command, I want to do it from an external source (like as an adesklet button). Not sure if this is at all possible! Let me know if I'm not being clear enough and I can't try to explain it a little better.

Try the command "xfce4-session-logout"

Sorry for taking so log to respond, but that worked wonderfully!

Thanks a lot.