http://tech.it168.com/KnowledgeBase/Articles/9/c/5/9c569b71826b7c594d54564796f53454.htm
http://social.msdn.microsoft.com/Search/zh-CN/windows?query=window%20workflow&Refinement=183&emptyWatermark=true&searchButtonTooltip=Search&ac=3
http://msdn.microsoft.com/zh-cn/library/ee851766.aspx