Global HotKey in Universal Windows App

So, I created a UWP app that can record multiple audio lines and save the recordings to MP3 files for multi-line recording in the game, which I can later edit separately (game audio, microphone, game comms, voice comms) like NVidia ShadowPlay / Share not yet supports. I achieve this multi-line setup with VAC.

I have a version of this tool written in regular Windows WPF C # and I have a system-wide HotKey Ctrl+Alt+R

that starts / stops recording, so when I am in full screen, I can start / stop recording without leaving full screen (focus window switch).

Could a global (system, app window out of focus) HotKey that fires some event in an app in a UWP app? I know the functionality is not supported for other platforms. But I only need to run it on Windows 10 Desktop and HotKey support is a must. Or can I achieve my goal in any other way for UWP apps?

PURPOSE : System key combination to launch a UWP app in an app without switching. Window focus and chatting with full screen games.