I recently was made aware of this thing called IOCP on windows and i began searching for more information on it but i couldn\'t find anything up to date (most of the examples we
IOCP is a feature that has been in Windows since the dark ages and has changed little in years since. As such, any samples etc. from 5+ years ago should still work pretty well today.
MSDN has some documentation on IOCP: http://msdn.microsoft.com/en-us/library/aa365198%28v=VS.85%29.aspx
Mark Russinovich also wrote up a great intro into IOCP: http://sysinternals.d4rk4.ru/Information/IoCompletionPorts.html
Mark also wrote a more thorough description of Windows' IO infrastructure in "Windows Internals" which is essential reading.
I also strongly recommend Jeffery Richter's "Windows via C/C++" which is also essential reading for anyone embarking on lower-level Windows programming.
HTH.