The GDI libraries/APIs that provide that are all still there, you just need to find a framework that lets you see them, are kick through the abstraction walls of [insert chosen app framework] to access them more manually. Be prepared for a bit of extra work on what more modern UI libraries make more automatic, and having to discuss everything rather than just what you want to differ from default.

Oh thanks, I always think what is there is the native. I don't realize the old graphics way is still there. Maybe the Win3.x style is still there too?

I think you can get back to Win9x/2k style controls by instructing the system to not add any theming. If you're finding a panel that is using 3.x controls, they're likely in the resources of the app/dll. Although the 3.x file picker can still be found in a couple of rare corners of the OS.

https://learn.microsoft.com/en-us/windows/win32/api/uxtheme/...

    STAP_ALLOW_NONCLIENT

Specifies that the nonclient areas of application windows will have visual styles applied.

Thanks, this is interesting!

If there is no application manifest, you will get Windows NT4 / Windows 9x style buttons. Just tested this on Windows 11.