How to make error pages in the browser?

Question

C++ / C#

Made a browser using webbrowser. When, for example, the dns of the site is not found, an error page from IE opens. How to change it?

Answer 1

There is no such possibility in the standard control, you need to make a wrapper to catch navigation errors. There is an example on msdn on how to do this.

Answer 2

Are all search engines broken?