static bool EnableCookies(int settingCode, int option)
    {
        if (!InternetSetOption(IntPtr.Zero, settingCode, ref option, sizeof(int)))
        {
            var ex = Marshal.GetExceptionForHR(Marshal.GetHRForLastWin32Error());
            //throw ex;
            return false;
        }
        return true;
    }

    protected override void OnStartup(StartupEventArgs e)
    {
        base.OnStartup(e);
        EnableCookies(81, 1);
    }