I know I’m going to forget this within the next 10 mins, so I thought I’d write it down. If you are using DLLImport in your UWP project and you’re not sure if the Store will allow it, then you can check for yourself by looking at the Supported API XML files in the certification kit folder. For me that’s;
C:\Program Files (x86)\Windows Kits\10\App Certification Kit
The files depend on the target architecture but you probably only need to check one of them, e.g. SupportedAPIs-x86.xml