https://devblogs.microsoft.com/oldnewthing/20110829-00/?p=9783
Why can't I use PSGUID_STORAGE like a GUID? - The Old New Thing
Aug 29, 2011 - The stgprop.h header file defines a GUID called PSGUID_STORAGE, but a customer was having trouble using it. GUID guid; ... // This generates a strange compiler...