Add a reference to OpcNetApi.dll and OpcNetApi.Com.dll in your project's Solution Explorer.
In the world of industrial automation and process control, interoperability is king. The standard (originally OLE for Process Control) allows different industrial hardware and software systems to communicate seamlessly. At the heart of many OPC Data Access (DA) and OPC Historical Data Access (HDA) client-server communications on the Windows platform lies a critical dynamic link library file: opcnetapi.dll . opcnetapi.dll
OpcNetApi.dll is a central library provided by the OPC Foundation that serves as a for Classic OPC (Object Linking and Embedding for Process Control) specifications, including DA (Data Access), HDA (Historical Data Access), and A&E (Alarms and Events). Core Functionality Add a reference to OpcNetApi
Some overly aggressive antivirus engines flag OPC DLLs (which interact with low-level COM and memory) as suspicious. They may delete or quarantine opcnetapi.dll without warning. At the heart of many OPC Data Access
: Errors may occur if the application target (x86 vs. x64) does not match the registered COM components. Access Denied : Frequent "Access Denied" errors are often related to DCOM configuration settings on the server or client machine. Missing XML : The accompanying OpcNetApi.xml
After installation, verify registry keys: