Since Cornelis had some trouble getting the DNS code running himself I would be glad to just have a look at his porting results.
A more advanced version as described by andrew would be nice of course, but I would rather have something short and simple for now

I add this to my code, and after sum small changes, due to differences between Esp8266 and Esp32, this code Runs. After Booting the AP comes up, and the captdns service is started. Then when I connect to the AP, the Mobil device automatically send a request and the captdns service tries to response...