http://bugs.winehq.org/show_bug.cgi?id=16325
--- Comment #122 from Ma Xiaojun damage3025@gmail.com 2012-02-01 07:42:22 CST --- Just for Win32 non-gurus' Information, usp10.dll is related to Uniscribe, an Windows NT i18n technology.
http://en.wikipedia.org/wiki/Uniscribe http://msdn.microsoft.com/en-us/library/dd374091.aspx
Wine insiders and hackers: How do check I wine's current i18n test suites? If there is something missing, I may try to code some test cases since I, at least, understand MSDN-speak.