Use otf/ tff for font in WinUI

Question

Is it possible to use these files for fonts in C++.
I've tried the c# examples but it doesn't seem to work?!

https://stackoverflow.com/questions/70371593/how-do-i-change-the-default-font-of-my-winui-application

Answer 1

This works for me with a random .ttf :
In App.xaml :

 <FontFamily x:Key="ContentControlThemeFontFamily">/Assets/Quirlycues.ttf#Quirlycues</FontFamily>  

Result : the default font is changed on controls with Quirlycues font=>