Need help with setting up proxy server in app

I have a need to create an app that can automatically switch it's LAN settings over to a proxy server from time to time.....can anyone start me down the right path to which class I should be using to create this monster?

I'm not looking for the entire code just the door would be a nice start.

Thanks

LAN settings have no Proxy configuration. I suspect that what are you trying to do is set the Internet Connection settings to use Proxy. This is achieved by changing the
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings key in the registry.

The value you need is ProxyServer. It is of type REG_SZ.