How do I make my WPF application as activex

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C#

WPF

I have a wpf application. I want to make this a activex com component (Out of process), so that from other applications like Excel, VB, etc.. I can call my WPF application as activeX com.

What I have tried:

I tried implementing a class as ActiveX, but it is an in-process(https://blogs.msdn.microsoft.com/asiatech/2011/12/05/how-to-develop-and-deploy-activex-control-in-c/). But I want to be an out-of-process.