Has anyone come up with a good Windows 3.x theme?

It is possible to directly change the appearance of the classic theme by modifying certain window properties (for example with Window Detective).

Adding the WS_EX_STATIC_EDGE property to a window makes the window frame look like Windows 3.x\NT 3.x.

Adding the BS_FLAT property to a button makes it flat (as the name suggests).

Adding the WS_BORDER property to a button make the button similary than Windows 3.x\NT 3.x (the only difference is the rounded corners).

Disabling the WS_EX_CLIENTEDGE property of checkboxes and edit boxes, then adding the WS_BORDER property makes them similar to Windows 3.x.

Some of these settings do not apply correctly to WinForm type controls or other controls that mimic Win32.

The ideal would be to be able to automate this. It should be easy with AHK, but probably too slow. The ideal would be a DLL injection.

In the screenshots, red stands for WindowFrame.

AccentColorizer is a tool for coloring user interface elements according to the accent color. This includes GDI managed elements and visual style elements.
What is very interesting in this tool is that it demonstrates that it is possible to change the colors of elements of the visual style on the fly. For now, the accent color is used, but it's probably possible to set any color, and add other visual style elements.
This can revolutionize visual style creation. For example, to create a fork of AccentColorizer affiliated with a Windows 3.x visual style.

github.com/krlvm/AccentColorizer