https://bugs.winehq.org/show_bug.cgi?id=51306
--- Comment #2 from Esme Povirk madewokherd@gmail.com --- Relevant code:
https://github.com/mono/mono/blob/284cb67f65098660f5764c8044f42c098cbe8934/m...
It seems ANSI marshaling was never really implemented, and they use UTF8.