Well, there's only one chapter left in this book. So what's the last ActionScript essential? Sharing your clever code with other programmers. To share ActionScript code, you can simply send that special someone to one or more of your class files. Or, if you're more ambitious, you can create an entire class library (i.e., group of classes) for compile time or runtime inclusion in an application. The final chapter of this book describes how to create and distribute code using class libraries.