What's a good reference for creating and updating Performance Counters in unmanaged code?

I have several apps that need to create and write to Performance Counters. One of them is written in C++. Currently, upgrading 开发者_JAVA百科that app to .NET is not an option. Where is a good resource for accessing Performance Counters using unmanaged code?

Thanks!

Start here: http://msdn.microsoft.com/en-us/library/aa373209(v=VS.85).aspx

Note that how you publish the data depends on your OS: http://msdn.microsoft.com/en-us/library/aa373165(v=VS.85).aspx