http://bugs.winehq.org/show_bug.cgi?id=31031
--- Comment #9 from Dan Kegel dank@kegel.com 2012-06-27 08:52:13 CDT --- Yeah, see also http://technet.microsoft.com/en-us/library/ee176998.aspx and http://stackoverflow.com/questions/9325261/how-to-get-list-of-devices-with-y...
Please add a test to your patch. It should pass regardless of whether there are any such devices present. See http://www.winehq.org/docs/winedev-guide/testing