How to use InternetGetProxyInfo from jsproxy.dll

Question

I'm trying to get the non-static proxy settings, assigned with proxy.pac, on a WinForms client using WinINet and a function called InternetGetProxyInfo from jsproxy.dll. http://msdn.microsoft.com/library/default.asp?url=/library/en-us/wininet/wininet/internetgetproxyinfo.asp I'm not sure if this is done correctly, but I'm using the following: [DllImport("jsproxy.dll")] private extern static bool InternetGetProxyInfo(string url, byte urllength, string hostname, byte hostnamelength, out string pointer, out byte pointerlength); When I'm calling it with the following, the output parameter for ProxyHostName (mypointer, string) keeps returning null, even though I'm sure that IE is using a proxy. InternetGetProxyInfo("http://www.mydomain.dk", 22, "www.mydomain.dk", 15, out mypointer, out mypointerlength); The call it self returns true, indicating, that the call went well. Does someone have any ideas ? Thanks, Thomas