Here's the C# code that interacts with the Windows APIs: https://gist.github.com/RachelfTech/d98a7c8f4c7eb8bb18a09552cf7bab40
Then you can reference https://docs.godotengine.org/en/stable/tutorials/scripting/cross_language_script... to interact with the data from C#.
Just wanted to note that the file is a bit messy (I didn't end up using all the code for the final project) and I also don't really know C#, but hope it helps anyway!