ActionScript 3, Flex, and Flex Builder 2 is the unstoppable new combination representing a revolution in Flash application development. Flex is a markup-based (MXML) language offering another alternative for creating web applications--you describe every aspect through markup, then the server translates it into the finished application. Flex Builder 2 is an easy-to-use programming environment that allows you to create applications in both Flex and ActionScript 3. To help you keep ahead of the game and get up to speed with ActionScript 3 and Flex, Flash development and training expert Charles E Brown has poured his knowledge of application development and effective learning into this essential comprehensive guide.