Windows key in Xubuntu

I was wondering, if there is some way to use the windows key or asign it to do something?

This is possible , but you haven't stated what do you want to do with windows key (ex. use it as shortcut,...)

You can make shortcut via Settings Manager/Keyboard/Application shortcuts.

Well, I meant something more, like.. Switching workspaces. That would be great!

settings manager >> window manager >> keyboard >> next workspace (assign your key).

have a look through the other keyboard shortcuts here, in case you want to do something different.

Thank you black veils and GreatDanton as well:) You have been very useful..

I use my windows key as compose key, which is a good way of typing accented characters. I had to use xmodmap to get it configured.

That is a great idea Impavidus, thank you..