winapi - Notification of when a network interface is ready on Windows

Question

How do I receive notification when a network interface is brought up and ready, under Windows XP?

Ready means the interface already obtained a network IP address via DHCP and is ready to use.

Answer 1

You can definitely get an event when an interface is ready! Just use IPHelper! The function you shall be looking for is NotifyAddrChange http://msdn.microsoft.com/en-us/library/aa366329%28v=VS.85%29.aspx and it is available starting from Windows 2000. When an adapter is up and running, it will be assigned an IP address, and thus triggered the callback.

A GetAdapterAddress can be used when triggered to figure the information you need. On Vista or above there is NotifyIpInterfaceChange that directly tell which adapter has IP change.