Delphi写的一个比较不错的 OPC DA Server程序，作为开发OPC Server的一个不错参考。OPC 是OLE在工控领域的应用，同一了不同组态软件之间及组态软件与应用程序之间的通讯标准，以前组态软件与应用程序之间的通讯主要是应用DDE技术。-Delphi wrote a quite good OPC DA Server procedures, the development of OPC Server as a good reference. OPC is OLE in the field of industrial applications, the same between different configuration software and configuration software applications and communications between the standard configuration prior to application software and communications between the main technology is the application of DDE.