NTP server implementation using Qt
How to use Qt to implement a NTP (Network Time Protocol) server to keep the system time of a local network synchronized?
Qt Does not provide any thing specific to NTP protocol. These two are different. You need to look at the details of NTP specifications and understand what does protocol do. Based on this you need to learn Qt Network Programming & implement the same.
Well have you considered just using one of the many available for free ?
You could set up a virtual linux server and have it work pretty fast.