OneNote MX developer API?

Hi,

I'm building an add-on for OneNote desktop. For that I can easily hook into the content via the COM API.

If I wanted to create a Windows Store App to do the same thing, namely interact with the OneNote content and do something else with it, what are my options?

I could rely on a desktop component that queries the desktop version and then displays content but this would (obviously) only work if Office is installed. On a Surface I can't rely on that so is there a way to query local OneNote content if the user only has OneNote MX installed?

Actually can a Windows Store app even use COM to interact with assemblies that are installed via the desktop?

Thanks