Looking at that chart one might be forgiven for thinking that Win32 desktop apps couldn't call WinRT APIs and vice-versa. I don't recall where, but I've seen a

Looking at that chart one might be forgiven for thinking that Win32 desktop apps couldn't call WinRT APIs and vice-versa. I don't recall where, but I've seen a good blog post explaining the errors and variations on that diagram. DrPizza maybe?