Win32 apps have always been able to break dragging, since ultimately the app process "owns" the window frame and can hang and block all interactions with it. (T

Win32 apps have always been able to break dragging, since ultimately the app process "owns" the window frame and can hang and block all interactions with it. (The system tries to catch simple cases of hanging where the app obviously isn't processing messages, but that doesn't cover all situations) Actually, UWP sort of solved/solves this, by having a different process own the window frame.