http://isys.coe.psu.ac.th/index.php?option=com_content&view=article&id=20:delegates-and-events-in-c–net&catid=21:%E0%B9%80%E0%B8%97%E0%B8%84%E0%B8%99%E0%B8%B4%E0%B8%84%E0%B8%81%E0%B8%B2%E0%B8%A3%E0%B9%80%E0%B8%82%E0%B8%B5%E0%B8%A2%E0%B8%99%E0%B9%82%E0%B8%9B%E0%B8%A3%E0%B9%81%E0%B8%81%E0%B8%A3%E0%B8%A1 http://dotnetdev.netfirms.com/DELEGATE.htm http://www.codeproject.com/KB/vb/Delegate.aspx http://secure.codeproject.com/KB/cs/DelegatesDummies.aspx http://www.codeproject.com/KB/cs/delegates-part1.aspx