quick and hopefully easy version question

im trying to have a label in my .xib file automatically change to the current application version number from the plist. Does anybody know how to get this value?

Thanks

Something like this:

current application's NSBundle's mainBundle()'s infoDictionary()'s valueForKey_("CFBundleVersion")
current application's NSBundle's mainBundle()'s infoDictionary()'s valueForKey_("CFBundleShortVersionString")