At first, this paper introduces the open source project Helix DNA Platform of RealNetworks corporation, then analyzes the framework and function of Helix Server and Helix Client in particular, then introduces the method of developing plug-in on Helix system and the relevant SDK facility. 首先介绍了RealNetworks公司的开源项目HelixDNAPlatform,详细分析了它的重要组成部分Helix服务器和Helix客户端的结构和功能,然后介绍了在此平台上开发插件的方法以及相应的SDK开发工具。