I'm on chapter 20 and am trying to work through the transitions demo but ran into a problem. In the UpdateInput() method, the first if-statement references InputHandler.ButtonType.A. I'm not able to find where this is defined in the XELibrary. I tried looking in the Chapter 20 XELibrary code that's on the CD and it wasn't in there either.
As a last resort, I tried copying the whole Chapter 20 folder to my desktop then opening the solution file for the Transitions Demo and even then it won't build, it says ButtonType is undefined in InputHandler. Am I missing something?