opc HDA 客户端,主要用于测试HDA服务器-opc HDA client, the main server for testing HDA

OPC 历史数据访问代码 从OPC基金会下载的，非常有帮助！-The OPC Historical Data Access Sample Code consists of an C# client application and a C++ server application. These applications implement the Historical Data Access Custom Interface Specification 1.20. These samples

Technosoft公司开源的经典OPC开发包，有一定的参考价值(The classic open source OPC development package of TechnoSoft company has certain reference value)