webBroser获取cookie

//取当前webBrowser登录后的Cookie值   [DllImport("wininet.dll", CharSet = CharSet.Auto, SetLastError = true)]static extern bool InternetGetCookieEx(string pchURL, string pchCookieName, StringBuilder pchCookieData, ref int pcchCookieData, int dwFlags, object lpReserved);//取出Cookie，当登录后才能取    private static string GetCookieString(string url){// Determine the size of the cookie      int datasize = 256;StringBuilder cookieData = new StringBuilder(datasize);if (!InternetGetCookieEx(url, null, cookieData, ref datasize, 0x00002000, null)){if (datasize < 0)return null;// Allocate stringbuilder large enough to hold the cookie    cookieData = new StringBuilder(datasize);if (!InternetGetCookieEx(url, null, cookieData, ref datasize, 0x00002000, null))return null;}return cookieData.ToString();}