How it uses windows is orthogonal to whether it’s based upon win32 APIs. The framework may add some of its own controls, but copy+paste and even touch hit testi

How it uses windows is orthogonal to whether it’s based upon win32 APIs. The framework may add some of its own controls, but copy+paste and even touch hit testing are win32. This is very unlike say KDE vs Gnome. I used to work on the office UWP apps, and I’ve seen the underlying code.