How to create skype like message window?

I am just trying to design skype like message window , for this I have taken the NSDrawer element. It contains : a table view on left, menu items on top, text field on right bottom and text view at central portion on right side. Using text view I can play with string being displayed but I cannot draw the line between messages or round rectangle surrounding user name and time stamp.

Can anyone suggest me how can I achieve same look and feel for central message view as in skype?? or is there any better control then N开发者_开发问答STextView to be used for it??

Thanks, for any suggestion... Miraaj

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The Adium instant messaging app is open source, why not see how they've done it?

http://trac.adium.im/wiki/GettingAdiumSource