https://bugs.winehq.org/show_bug.cgi?id=41909
--- Comment #6 from Nikolay Sivov bunglehead@gmail.com --- Ok, thanks. I checked out your trunk revision, and I think I see where this comes from, this dialog does:
--- r->valueSlider.SetRange(-SliderResolution / 2, SliderResolution / 2); r->valueSlider.SetTicFreq(SliderResolution / 8); r->valueSlider.SetPageSize(SliderResolution / 8); ---
According to my testing SetTicFreq() makes a difference, because it updates thumb position (TBM_SETTICFREQ does not have additional deferred update argument, so it always updates). We currently don't touch thumb at all on TBM_SETTICFREQ. Could you do a test build of your application without SetTicFreq and SetPageSize call to confirm that it breaks on windows too?