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Why do I receive "Access denied" when attempting to access my HID?

 Windows 2000 and later have exclusive read/write access to HIDs that are configured as a system keyboards or mice. An application can obtain a handle to a system keyboard or mouse by not requesting READ or WRITE access with CreateFile. Applications can then use HidD_SetFeature and HidD_GetFeature (if the device supports Feature reports).

 

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