How to set a proxy for Webbrowser Control without effecting the SYSTEM/IE proxy

Question

How can I set a proxy for a Webbrowser Control without setting a proxy for IE?

Basically I want my application to use a certain proxy however obviously I do

Answer 1

    public struct Struct_INTERNET_PROXY_INFO
    {
        public int dwAccessType;
        public IntPtr proxy;
        public IntPtr proxyBypass;
    };

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

    //to activate use like this strProxy="85.45.66.25:3633"
    //to deactivate use like this strProxy=":"
    public static void RefreshIESettings(string strProxy)
    {
        try
        {
            const int INTERNET_OPTION_PROXY = 38;
            const int INTERNET_OPEN_TYPE_PROXY = 3;

            Struct_INTERNET_PROXY_INFO struct_IPI;

            // Filling in structure 
            struct_IPI.dwAccessType = INTERNET_OPEN_TYPE_PROXY;
            struct_IPI.proxy = Marshal.StringToHGlobalAnsi(strProxy);
            struct_IPI.proxyBypass = Marshal.StringToHGlobalAnsi("local");

            // Allocating memory 
            IntPtr intptrStruct = Marshal.AllocCoTaskMem(Marshal.SizeOf(struct_IPI));

            // Converting structure to IntPtr 
            Marshal.StructureToPtr(struct_IPI, intptrStruct, true);

            bool iReturn = InternetSetOption(IntPtr.Zero, INTERNET_OPTION_PROXY, intptrStruct, Marshal.SizeOf(struct_IPI));
        }
        catch (Exception ex)
        {

            //TB.ErrorLog(ex);
        }
    }

[1] https://social.msdn.microsoft.com/Forums/fr-FR/f4dc3550-f213-41ff-a17d-95c917bed027/webbrowser-control-for-setting-proxy?forum=winforms