How to create wix installer with wpf form?

Question

C++ / C#

I'm making an installer for wix. Didn't really like the standard look. On the whole, I got it right. How can I make my own installation form, for example, installing wix 3.8 itself? There's a WPF form. That is, when setup is launched, your form opens and when you click on the button, values ​​of the session type are set for wix and the main installation starts.