winui

MSTest.Sdk 4.5 and Microsoft.Testing.Platform 2.5 make the UWP or WinUI 3 app the test host itself. [UITestMethod] runs each test on the real dispatcher, packaged and AppContainer apps are activated by AUMID through a sidecar controller, and unpackaged WinUI finally works.

Two different things get called a modal window in .NET MAUI 11. PushModalAsync gives you a modal page on every platform. A real OS window that disables its owner has no MAUI API at all, so here is the WinUI OverlappedPresenter.IsModal plus Win32 owner-handle interop that actually works on Windows, and what to do on Mac Catalyst instead.