The UPnP SDK Windows is easy to use, but very powerful. You can seamlessly integrate the sdk with your software to make your software control router port forwaridng within three function calls. The UPnP SDK windows let you can fetch current port forwarding entry in router, add port forwarding entry into router, delete port forwarding entry from router. You can even easily get router's ip address with our UPnP SDK Windows. It is very often that a software need router port forwarding function. This way the software can communicate with router to add port forwarding entry into router. So internet users or services can access your software that behind router from outside. For example, like MSN or a lots of P2P software(like eMule) or online games, they all need the router port forwarding function. Our UPnP SDK Windows include below features: 1. Fetch port forwarding entry from router; 2. Add port forwarding entry into router; 3. Delete port forwarding entry into router; 4. Easily get router's ip address. In the case that your pc behind router, your pc just have private ip address. The router have the real public ip address that internet users or services can directly connect. Some time, your software need to get router's ip address to implement some special function. Our UPnP SDK Windows include a example source file that let you know how to use this sdk without learning.