记两个文章

http://blog.csdn.net/mxfhhh/archive/2006/08/03/1014849.aspx 

 

http://blog.csdn.net/themaster/archive/2006/08/03/1015910.aspx

 

 

 

http://community.csdn.net/Expert/topic/4928/4928146.xml?temp=5.540103E-02