Book excerpt: This is the e-book version of Adobe Flex 4: Training from the Source, to access the files that accompany this title please refer to the URL which is listed at the end of the e-book Adobe Flex: Training from the Source is the best-selling and most trusted resource for learning about Adobe Flex. Written by a team of authors with practical experience as consultants, mentors and developers of courseware, this book/CD uses project-based tutorials, and is designed to teach beginning Flex developers the details of building and architecting real-world rich internet applications using Flash Builder incorporating MXML and ActionScript 3.0. The book includes a CD that contains all the files used in the lessons, plus completed projects for comparison. This latest edition includes complete coverage of New Flex 4 features such as the Spark Component model, Advanced Skinning, Component Creation, and much more. All of Peachpit's eBooks contain the same content as the print edition. You will find a link in the last few pages of your eBook that directs you to the media files. Helpful tips: If you are able to search the book, search for "Where are the lesson files?" Go to the very last page of the book and scroll backwards. You will need a web-enabled device or computer in order to access the media files that accompany this ebook. Entering the URL supplied into a computer with web access will allow you to get to the files. Depending on your device, it is possible that your display settings will cut off part of the URL. To make sure this is not the case, try reducing your font size and turning your device to a landscape view. This should cause the full URL to appear.