The Device Manager requires that you register your class or device installers by adding Installer and Icon entries to the registry for the given class. The system maintains a System\CurrentControlSet\Services\Class branch under HKEY_LOCAL_MACHINE for information about each class. The value of the key contains the localized description of the class.
The Installer and Icon entries have this form:
Installer=installer-DLL-name[,Installer Entry Point]
Icon=index [, icon-DLL-name]
The Device Manager uses the icon to represent your installer to the user. If you fail to register include a Installer entry, the Device Manager takes the default actions in all cases.