https://bugs.winehq.org/show_bug.cgi?id=57338
--- Comment #3 from Esme Povirk madewokherd@gmail.com --- I think ntdll is able to do this with $HOME because it does getenv() on the unix side. That doesn't really make sense for appwiz.cpl.
I guess maybe we could use wgetenv and convert using UNIXCP?