iTunes like GUI

I've searched around but I can't seem to find anything about what I'm trying to do. What I'm trying to do is create an app that has an iTunes look to it.

See here: http://www.askdavetaylor.com/0-blog-...unes-store.png[^]

Notice how the file menu, program title and close/minimize/maximize buttons are all on the same row and the top of the program is one big silver block with stuff on it. How did Apple do that for the Windows version of iTunes? Valve did a similar kind of thing with Steam.