Does this mean that Apple is using the same libraries they are asking third part...

pjmlp · on Dec 20, 2021

Visual Studio used MFC until it was rewriten in WPF.

SQL Server Studio used MFC until it was rewriten in WPF.

The Ribbon on WPF was originally designed on Office, then made availalble as a COM library on Windows 7 and wrapped as WPF bindings.

MFC was replaced by ATL, given how much Windows and Office teams love COM, and they keep loving it, via WRL and now C++/WinRT and WIL.

balls187 · on Dec 20, 2021

> Does this mean that Apple is using the same libraries they are asking third party developers to use?

Yes and now. Apple still has and uses private APIs, which by license agreement 3rd party developers cannot and should not use.

Additionally SwiftUI is only ~3 years old, so it does not yet have 1:1 parity needed to fully migrate all of Apple's apps over.

That said, I to was disappointed that Microsoft had their own internal UI libraries for WindowsPhone7/8 which were not exposed to developers, such as the Map tile libraries.