How to make a UI like in Mail?

FROM : Thomas Wickl
DATE : Wed Mar 12 23:54:12 2008

Hello,

I´m new to Cocoa and I really need a hint in UI Design. How can I 
create this Panel like it is shown in a lot of
Application like Mail?

http://www.spongedpics.com/upload/WH1205339930W47d8071ae5a64-Panel.jpg

And also how do they make this Bar at the Bottom?

http://www.spongedpics.com/upload/WS1205340286W47d8087ec9cee-PanelBar.jpg

Thank you so much for every hint you can give me!!!

Thomas_______________________________________________

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