ActionScript 3.0 Cookbook Download the files at http://examples.oreilly.com/9780596526955/AS3CBLibrary.zip Instructions for setting classpath: Flash CS3 Extract files Select Edit > Prefrences Select ActionScript from Category list Select the ActionScript 3.0 Settings button Click the + button to add a new classpath Click the Browse to path button (circle with crosshairs) to browse Browse to the AS3CBLibrary directory, select it, and click OK Click OK in ActionScript 3.0 Setting dialog Click OK in Preferences dialog Flex Builder 3 Extract files Select the Flex Builder project from the Flex Navigator Select File > Properties Select Flex Build Path from the list Click on the Source Path tab if it isn't already selected Click on the Add Folder button In the Add Folder dialog click on the Browse button Browse to the AS3CBLibrary directory, select it, and click OK Click OK in the Add Folder dialog Click OK in Properties dialog