round with these tools yet, check out Erik J. Barzeski's "Two Lines of Code" article for a gentle introduction.)
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Cocoa's Interface Builder is even better than other "visual interface" toolkits like HyperCard, FaceSpan, and FileMaker's layout tools because what you create doesn't just try to imitate the feel of a Mac interface, it really is a Mac user interface. There are other toolkits on other platforms which offer this simplicity, but the Mac OS X developer tool