internal static class CookieReader

    /// <summary>

    /// Enables the retrieval of cookies that are marked as "HTTPOnly".

    /// Do not use this flag if you expose a scriptable interface,

    /// because this has security implications. It is imperative that

    /// you use this flag only if you can guarantee that you will never

    /// expose the cookie to third-party code by way of an

    /// extensibility mechanism you provide.

    /// Version:  Requires Internet Explorer 8.0 or later.

    /// </summary>

    private const int INTERNET_COOKIE_HTTPONLY = 0x00002000;

 

    [DllImport("wininet.dll", SetLastError = true)]

    private static extern bool InternetGetCookieEx(

        string url,

        string cookieName,

        StringBuilder cookieData,

        ref int size,

        int flags,

        IntPtr pReserved);

 

    /// <summary>

    /// Returns cookie contents as a string

    /// </summary>

    /// <param name="url"></param>

    /// <returns></returns>

    public static string GetCookie(string url)

    {

        int size = 512;

        StringBuilder sb = new StringBuilder(size);

        if (!InternetGetCookieEx(url, null, sb, ref size, INTERNET_COOKIE_HTTPONLY, IntPtr.Zero))

        {

            if (size < 0)

            {

                return null;

            }

            sb = new StringBuilder(size);

            if (!InternetGetCookieEx(url, null, sb, ref size, INTERNET_COOKIE_HTTPONLY, IntPtr.Zero))

            {

                return null;

            }

        }

        return sb.ToString();

    }