Hardware Helper Library for C# How to monitor, enable, and disable hardware devices from C#. There isn't really a lot of background required for you to use the library I've provided. The heart of HardwareHelperLib is the unmanaged SetupAPI.DLL that is part of the platform SDK. Properly declaring and marshalling the API was the tough part and the whole reason I'm posting this code is so you don't have to spend your whole weekend banging your head against the table too. It's ALWAYS helpful to understand how an operating system interacts with the hardware and if you've never looked at the source code for DEVCON or some of the other drivers in the DDK it certainly wouldn't hurt you, (well it might hurt a little if you've strayed from C++ in favor of C# for a few years), but regardless whether you understand the inner-workings of the class or not you still should be able to use it. The example is very simplistic. The only prerequisite assumed is that you are at least somewhat familiar with Windows messages.