https://bugs.winehq.org/show_bug.cgi?id=50756
--- Comment #21 from Louis Lenders xerox.xerox2000x@gmail.com --- Your thoughts is exactly what i thought too.
Isn`t it so that when SetFileInformationByHandle delegates the call to NtSetInformationFile first some "conversion" needs to be done of the info structure. There`s several examples in kernelbase/file.c where RtlDosPathNameToNtPathName_U does that job.