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http://msdn.microsoft.com/library/default.asp?url=/library/en-us/wmisdk/wmi/win32_classes.asp
Note: You might take a look at the Win32_Fan WMI class, which represents the properties of a fan device in the computer system. It contains a property called DesiredSpeed, which may be of interest.
Article ID: W16278
File Created: 2004:03:30:15:43:44
Last Updated: 2004:03:30:15:43:44