Change 2 registry entries in real time

I need a VB function that when a button is clicked it will change IE's proxy and User Agent Registry settings in real time (will change the current proxy to a new one from a list and change the current User-Agent to a new one from a list) I've alredy thrown together some code that changes the proxy in the registry but for some reason the changes dont take effect right away. I'm using Windows XP and Internet Explorer v. 6.0.2600. I'd like to get the function sometime withen the next 24 hours. ## 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. 4) Must work 100% on my computer, no exceptions. ## Platform IE 6.0, Windows XP, VB 6.0