.Net/C# 应用程序直接读取本地 Cookies 文件(WinXP SP2 调用 API: InternetGetCookie 无果)
using System;
using System.IO;
using System.Text;
using System.Text.RegularExpressions;
using Microsoft.Win32;
public class Class1
{
 static void Main(string[] args)
 {
  System.Console.WriteLine(GetCookiesFromFiles("et8")); //支持 WinXP SP2
  System.Console.WriteLine(GetCookie("http://bbs.et8.net"));
 }

 [System.Runtime.InteropServices.DllImport("wininet.dll", CharSet=System.Runtime.InteropServices.CharSet.Auto, SetLastError=true)]
 public static extern bool InternetGetCookie(string lpszUrlName,string lpszCookieName,StringBuilder lpszCookieData,ref int lpdwSize);

 [System.Runtime.InteropServices.DllImport("kernel32.dll")]
 internal static extern Int32 GetLastError();

 public static string GetCookie(string url) //Win32 API
 {
  int size = 1000;
  StringBuilder sb = new StringBuilder(size);

  if (!InternetGetCookie(url,"", sb,ref size))
  {
   Console.WriteLine("Error code:{0}", GetLastError());
  }
  return sb.ToString();
 }

 public static string GetCookiesFromFiles(string MasterDomain) //Cookies File
 {
  string S = null;
  RegistryKey key = Registry.CurrentUser.OpenSubKey(@"Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders", false);
  if (key != null)
  {
   string val = (string) key.GetValue("Cookies");
   if (val!= null)
   {
    string[] F = Directory.GetFiles(val);
    string s = null;
    int i;
    Regex r = new Regex(@".*@" + MasterDomain + @"*\[\d+\].txt");
    for (i = 0; i < F.Length; i++)
    {
     if (r.IsMatch(F[i]))
     {
      s = F[i];
     }
    }
    if (s != null) //s 就是最新文件
    {
     StreamReader sr = new StreamReader(s);
     s = null;
     i = 1;
     while ((s = sr.ReadLine())!= null)
     {
      if (s == "*" || s == "\n")
      {
       i = 0;
      }
      //每节只读两行
      if (i == 1)
      {
       S += s;
      }
      else if (i == 2)
      {
       S += "=" + s + "; ";
      }
      i++;
     }
    }
   }
  }
  return S;
 }
}