1、用xmlhttp可以抓  
  2、用HttpWebRequest也可以  
   
  1：  
  public   string   StealUrl(string   URL)  
  {  
  MSXML2.ServerXMLHTTPClass   xmlhttp=new   MSXML2.ServerXMLHTTPClass();  
  xmlhttp.open("GET",URL,false,null,null);  
  xmlhttp.setRequestHeader("CONTENT-TYPE","text/xml;charset=gb2312");  
  xmlhttp.send(null);  
  return   System.Text.Encoding.GetEncoding("gb2312").GetString((byte[])xmlhttp.responseBody);  
  }  
  2：  
  System.Net.HttpWebRequest   request   =   (HttpWebRequest)HttpWebRequest.Create("http://www.xxx.com");                                  
  request.Accept   ="image/gif,   image/x-xbitmap,   image/jpeg,   image/pjpeg,   application/x-shockwave-flash,   application/vnd.ms-excel,   application/vnd.ms-powerpoint,   application/msword,   */*";  
               
  System.Net.HttpWebResponse   response   =   (HttpWebResponse)request.GetResponse();  
     
  Stream   myStream   =   response.GetResponseStream();  
  StreamReader   sr   =   new   StreamReader(myStream,     System.Text.Encoding.Default);  
       
  textBox1.Text   +=   sr.ReadToEnd();  
  myStream.Close();  
   
  替换就和替换字符串一样，具体的需求方法也不同，简单的用replace就行了，麻烦点的用正则表达式   
 

using MSXML2;

VS 2005的项目－－添加引用－－com－－找到　microsofot　xml　v２.６，－－确定