I'm in the process of doing so. We had some issues with it initially but it seemed that it got better since a couple of updates ago. I vastly prefer it to having to ship mdnsresponder alongside my application though.

I'm basing my "deprecated" comment on this: https://docs.microsoft.com/en-us/uwp/api/Windows.Networking....

However that looks to be different from the windns.h stuff. To be honest, I wasn't aware of windns.h and just assumed it was the above link you were talking about. It's probably worth taking a look at :)