如何在SharePoint 2010中创建自定义字段类型

参考资料：
1. MSDN：http://msdn.microsoft.com/en-us/library/ee231593(VS.100).aspx
2. 视频：http://www.bing.com/videos/watch/video/creating-custom-sharepoint-server-2010-field-types-and-field-controls-with-silverlight-3/10tvbkh3n