Class property providers can be registered in the class install section. A property provider entry point specified the class section of the registry will be called any time properties are displayed for a device of the appropriate class. A property provider can be registered by using the following addreg entry in the class AddReg section.
hkr,,EnumPropPages,,"DLL,Entrypoint"
Similarly a property providers can be registered for a specific device by using the following addreg entry in the device install section. Doing this makes HKR relative to the driver section and thus is invoked only for the specific device.
hkr,,EnumPropPages,,"DLL,Entrypoint"