How can I create an Uno application runs on Windows 7?

[Fevola]

Hi everyone,

I'm currently evaluating Uno Platform for a project that needs to support both Windows 7 and Windows 10/11.
According to the documentation, I found the following statement:

Two paths are available:Applications built with Uno Platform's Skia Desktop target framework, supporting Windows 7 and above, using the net9.0-desktop target framework.Applications built with WinAppSDK/WinUI run on Windows 10.

So I assumed that creating a new Uno application targeting net9.0-desktop (or net10.0-desktop) should work on Windows 7, and created a brand new Uno project using the latest Uno templates.
The generated project only provides: net9.0-desktop or net10.0-desktop, I tried both of them and published the application as
Self-contained. The application starts correctly on Windows 10. But on Windows 7 it crashes immediately during startup.

The exception is:

System.TypeInitializationException
---> System.EntryPointNotFoundException: Entry point was not found.
at Windows.Win32.PInvoke.SetProcessDpiAwarenessContext(...)
at DpiBootstrap.Init()
at Uno.UI.Runtime.Skia.Win32.Win32Host..cctor()

The complete stack trace points to: Uno.UI.Runtime.Skia.Win32.Win32Host, which suggests that the application is using the new Win32 host.

My questions

Is Windows 7 support no longer available in the latest templates?
If I need to support Windows 7 today, what is the recommended approach?

Any guidance would be greatly appreciated. Thank you!

[lextm]

Windows 7 reached end-of-life a few years ago, and Microsoft offers no more support for it (especially security patches). So, why do you want Windows 7 support? For business or just for fun?

I raised a request for them to retire Windows 7 support officially, but so far they have not responded.

[Fevola]

Thanks for your reply!

The main reason I still need Windows 7 support is for work. Even though Windows 7 is no longer supported by Microsoft, it's still running on some older machines. Upgrading the OS can introduce unexpected issues—for example, some legacy software may stop working—so people are generally reluctant to touch systems that are still doing their job.

So, if I understand correctly, while Windows 7 support is no longer considered a priority, the project hasn't officially dropped it yet. If so, I'd really appreciate any guidance on how to get it working.

Thanks again!

[SongOfYouth]

Yes, many govement and hospital are using win7 still now!