Windows XP Internet Connection Sharing Admin (NAT Admin)

Problem: Windows XP has internet connection sharing, with it, there is a network address translation service that allows for users on the local network to gain internet access. With XP there is no easy way to allow/disallow local IP addresses to route to the internet (gain internet access). Solution (code requirements): A piece of code that will allow me to A) gain a list of the local IP addresses that are using ICS/NAT. B) be able to programatically allow/disallow a local ip address from routing to the internet WITHOUT having to stop the service (IE: allow an ip to route or not route without disturbing the routing for any other ip on the network). In addition, the local address should sill be able to access all resources on the local subnet, just not routing to the internet. Examples: [login to view URL] has a feature that allows you to 'Admin' the NAT list. This feature will allow an admin to enable NAT or disable NAT for a specific local IP. Thus allowing an internet cafe to enable an IP for a set length of time. I do not need the timing code, just the turn on/off code. I have done some research for you and there are ICS/NAT API's available at: [login to view URL] [login to view URL]?frame=true ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Installation package that will install the software (in ready-to-run condition) on the platform(s) specified in this bid request. 3) Complete ownership and distribution copyrights to all work purchased. ## Platform Windows XP or Windows 2000 (preferably XP) Preferably C#, however VB, VBscript, Javascript, C++ are all acceptable.