ActionScript 3 is the foundation language for Adobe's entire Flash Platform, which can be used to build applications of unprecedented richness and power. In just 24 lessons of one hour or less, Sams Teach Yourself Adobe ActionScript 3 CS4 in 24 Hours will help ActionScript 3 beginners and upgraders gain true mastery over ActionScript 3, so they can build production applications for virtually any environment. In this book's straightforward, step-by-step approach, each lesson builds on everything that's come before, helping you learn all of ActionScript 3's core features and techniques from the ground up. Friendly, accessible, and conversational, this book gives ActionScript 3 beginners a practical grounding in the entire language, without ever becoming overwhelming or intimidating. Coverage includes: creating interactivity, working with data and multimedia, using XML, designing effective programs, troubleshooting and debugging, and much more. Throughout, step-by-step instructions carefully walk you through the most common ActionScript 3 questions, issues, and tasks...Q and As, Quizzes, and Exercises help you build and test their knowledge..."Did You Know?" tips offer you insider advice and shortcuts...and "Watch Out! " alerts help you avoid problems. By the time you've finished with these lessons, you won't just understand ActionScript 3: you'll be comfortable using it in real-world projects.