In addition, Chapters 14 through 16 provide extensive examples that show how to use the Google AdWords APIs.
Chapters 14 and 16 use PHP in a series of complete web pages. In contrast, Chapter 15 shows a C#.Net Windows application that is compiled using Visual Studio.Net (2003 or later).
If you want to play with the applications presented in these chapters, I do not expect you to type them in by hand. The source code for each of these three chapters is available as a zipped archive from both http://www.braintique.com/ad/ and http://www.oreilly.com/catalog/buildinggoogle, and you'll also find the PHP applications from Chapter 14 and 16 ready for you to use at http://www.braintique.com/ad/ (once you have your Google AdWords APIs developer key, as explained in Chapter 13).