Introduction - If you have any usage issues, please Google them yourself
The source code is based on C++ development OPC client program development examples.
OPC (OLE for Process Control) is based on the Microsoft OLE (now Active), COM (component object model) and DCOM (Distributed Component Object Model) technology requires a functional formulation of an open and interoperable style user interface standard, it guarantees the interoperability of automation / control applications and system / region between devices. It uses the OLE/COM mechanism as the application level communication standard and adopts the CLIENT/SERVER mode.
The OPC specification provides two sets of interface schemes, namely, custom interfaces and automated interfaces. Custom interface and high efficiency, the best performance can play through the interface of the OPC server, using C++ language customers generally use custom interface scheme; automation interface enables explanatory language and macro language possible to access the OPC server