Adding multiple IPs to network adapter in C++

[aalfabob]

I was wondering if there are any functions built into the Windows API or any other 3rd party libraries which would allow me to add multiple IPs to a single network adapter.

I'm working on a P2P program which allows IP spoofing and due to some routers blocking IPs not within the local area network (Packets being sent out), I figured that adding them to the adapters should fix the problem. I know that it is possible to add other IPs using the local network connections tools within Windows and I figured there may also be a way to access this in the registry?