title: Implementing an OPC DA client from scratch
body: <p>I would like to implement my own OPC DA client (versions 2.02, 2.05a, 3.00) from scratch but without using any third-party. Also I would like to make use of OPCEnum.exe service to get a list of installed OPC servers. Is there any kind of document that explains detailed and step by step the process to implement an OPC client?</p>