http socket

http://social.microsoft.com/Forums/zh-CN/2212/thread/a38dd6bf-1ab3-4a39-8066-c96432b0580c

http://www.xinyuonline.net/blog/?action=show&id=64

http://www.cnblogs.com/rudy/archive/2009/05/21/1486672.html

http://blog.csdn.net/caiguoxing/archive/2007/08/23/1756416.aspx