How to get a PROXY IN C# Webbrowser

//SOURCE: Rogue: http://thebot.net/threads/tut-proxy-support-in-vb-net-c.142717/

/*C#
Spoiler
STEP 1
This code is accessing the .dll to enable the use of proxies.
Goes at the top of the class (anywhere really but lets be orginaized)

PrivateDeclareAuto*/

    [DllImport("wininet.dll")]
    static extern bool InternetSetOption(IntPtr hInternet, int dwOption, IntPtr lpBuffer, int lpdwBufferLength);

/*STEP 2
Now we must create a structure so that the proxy only affects the webbrowser in your application. Not your actual webbrowser
(IE, Chrome, Firefox, etc.)
*/

public struct Struct_INTERNET_PROXY_INFO {

    public int dwAccessType;

    public IntPtr proxy;

    public IntPtr proxyBypass;
}

//STEP 3
//Now that we have done that we can now create the function to call and set the proxy.

    void RefreshIESettings(string strProxy) {
        const int INTERNET_OPTION_PROXY = 38;
        const int INTERNET_OPEN_TYPE_PROXY = 3;
        Struct_INTERNET_PROXY_INFO s_IPI;
        s_IPI.dwAccessType = INTERNET_OPEN_TYPE_PROXY;
        s_IPI.proxy = System.Runtime.InteropServices.Marshal.StringToHGlobalAnsi(strProxy);
        s_IPI.proxyBypass = System.Runtime.InteropServices.Marshal.StringToHGlobalAnsi("Global");
        IntPtr intptrStruct = System.Runtime.InteropServices.Marshal.AllocCoTaskMem(System.Runtime.InteropServices.Marshal.SizeOf(s_IPI));
        System.Runtime.InteropServices.Marshal.StructureToPtr(s_IPI, intptrStruct, true);
        InternetSetOption(IntPtr.Zero, INTERNET_OPTION_PROXY, intptrStruct, System.Runtime.InteropServices.Marshal.SizeOf(s_IPI));
    }
//STEP 4
//Now to call the sub we just use 1 line of code:

RefreshIESettings("IP:PORT");