This is a four-day, hands-on introduction to developing rich Internet applications (RIAs) using the Flex 4.x framework. The emphasized topics include: Custom components and layout control; Handling and extending events; Validating and formatting data; Navigation, animation, and visual state control; Text and style control; Spark component skinning; Introduction to remote data access; Working with typed data in DataGroup and DataGrid components; and Deploying Flex applications over the web and on AIR.