http://bugs.winehq.org/show_bug.cgi?id=5322
------- Additional Comments From dank@kegel.com 2006-24-06 22:04 ------- For future reference: http://support.microsoft.com/kb/q237304/ mentions that HKEY_LOCAL_MACHINE \SOFTWARE \Microsoft \Windows NT \CurrentVersion \Perflib \009 is equivalent to HKEY_PERFORMANCE_DATA"Counter 009" and the latter form worked around a bug in nt 4.
http://www.microsoft.com/msj/archive/S271.aspx describes how to access the data via the registry.
http://www.3rd-evolution.de/tkrammer/docs/performance_api.html gives example code for properly using "230" (the one we need).