http://bugs.winehq.org/show_bug.cgi?id=21413
--- Comment #14 from NSLW lukasz.wojnilowicz@gmail.com 2010-01-20 01:39:55 --- (In reply to comment #13)
Thanks. According to the log correct unicode character is generated but because of Alt being pressed WM_SYSCHAR message gets generated instead of WM_CHAR. That's unavoidable, that's how Alt modifier is supposed to work under win32. I'd say that this is wontfix.
It works somehow on MS Windows. At least for MS Word I've got easy fix from Rosanne DiMesio, thank you.