Programmatically change IE proxy settings

[Guest]

I need to change the IE proxy settings from code. I know I can update the
registry directly (HKCU\Software\Microsoft\Windows\CurrentVersion\Internet
Settings). The drawback of this option is that I need to restart IE to inform
that the settings have been changed.

The Control Panel applet "inetcpl.cpl" is also capable of changing the proxy
server without restarting IE. So I guess there is some kind of COM interface
or Windows message involved to change the proxy without restart. Anyone knows
how?

 

[Guest]

The function 'InternetSetOption' from WININET.DLL helps to do this.
Unfortunately, it is pretty hard to access this from managed code