Is there a way to launch the IE proxy settings dialog from the Windows command line to save time going through menus in any application?
Alternatively if all you want to do is select "Automatically detect Settings" You could just use Reg.exe to modify the Registry Directly.
REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings" /v ProxyServer /d "hhttp=proxy-url:port;https=proxy-url:port;ftp=proxy-url:port;socks=proxy-url:port;" /t REG_SZ /f