Heres an interesting concept:-
www.pinvoke.net
It's a Wiki solely devoted to collecting P/Invoke declarations for API functions. It's desktop windows specific of course. I've been thinking about something like this that we could host at OpenNETCF.org to provide a searchable reference to Windows CE P/Invokes - should we start a P/Invoke Wiki?
Disclaimer The opinions expressed herein are my own personal opinions and do not represent my employer's view in anyway.