> So I copied and modified a version-check from dlls/schedsvc/rpcapi.c to skip the tests on early winversions. There are still test failures but they seem to happen in ShouldSystemUseDarkMode.
That looks reasonable.
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https://gitlab.winehq.org/wine/wine/-/merge_requests/4043#note_48599
We have a number of debugstr_an(..., 4) used for the same purpose in different modules. It will give different output if replaced with fourcc helper, because of isprint(), but still might be worth considering.
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https://gitlab.winehq.org/wine/wine/-/merge_requests/3994#note_48597