Yeah this is part of the new C++/CLI standard. It will be an official ISO standard now so this is the way to do C++/CLI stuff.

Here are some videos on C++/CLI.
http://channel9.msdn.com/showpost.aspx?postid=181706
http://msdn.microsoft.com/visualc/learning/vcexpvids/default.aspx
http://msdn.microsoft.com/vstudio/tour/vs2005_guided_tour/VS2005pro/Framework/CPlusCLI.htm
http://msdn2.microsoft.com/en-us/library/ms235630.aspx

BTW, Since this is now a standard, it should be available in all C++ tools in the near future.