Comment 28 for bug 111061

At Wineconf, the Wine developers agreed on an alternative solution that seems optimal for Wine:

Bundling specially-crafted Windows themes alongside system themes. When I switch to the Human theme in Ubuntu, or the Ubuntu-Studio theme, they should both have an included Windows .theme file that is essentially ignored by the system. Wine can then read that .theme and use it.

One nice advantage of doing this is that we can make Wine applications look slightly different from GTK ones when it's necessary. By customizing the Windows theme, we can also avoid the slow parts that Wine doesn't quite handle right, and actually take advantage of the (mostly) working parts of Wine's theming engine.