https://bugs.winehq.org/show_bug.cgi?id=55742
--- Comment #4 from Louis Lenders xerox.xerox2000x@gmail.com --- (In reply to gerard.labadie from comment #3)
Thanks Louis
how do I apply the modification seen in the attachment, in order to test?
Hi for that you'd have to apply that to wine source code and compile.
If you have a windows partition by hand it might be much easier to copy native uxtheme.dll from it to your wineprefix, and set it to native