I’ve been reading the CefSharp documentation, and done quite a bit of googling, and I do see examples like this.

It seems that they are saying that if you want JavaScript message to your C#, start using CefSharp.PostMessage.

I can’t use CefSharp.PostMessage. I have no control over the Javascript or the Code.

But, I do know that it at some point sends a message to window.parent.postMessage.

When that Javascript is executed by the webpage, how can I get the data in my C# (using CefSharp)?