http://bugs.winehq.org/show_bug.cgi?id=27893
--- Comment #4 from Hans Leidekker hans@meelstraat.net 2011-08-10 14:16:37 CDT --- (In reply to comment #3) ...
MSXML2.SERVERXMLHTTP uses Winhttp according to MS. Maybe just register this class and make it use Winhttprequest?
Do you have a reference?