Here's an explanation. It's old, but probably still accurate. http://blogs.msdn.com/b/oldnewthing/archive/2004/11/10/255047.aspx http://blogs.msdn.com/b/oldnew

Here's an explanation. It's old, but probably still accurate. http://blogs.msdn.com/b/oldnewthing/archive/2004/11/10/255047.aspx http://blogs.msdn.com/b/oldnewthing/archive/2004/11/10/25504...