[sshearer]

Well, I now have MS-Visual Studio 2008 Professional installed, along with the Standard & Professional versions of the WM6 SDK (to be able to eventually support a couple different runtime environments).

Wonder of wonders, they actually have a sample C# program which demos detecting when the phone rings !

I have cut it down to the bare essentials and installed it, and it actually works ! So now I just need to do a bunch more reading & experimenting...

Steve.