If your project is set to x64 but the OPC server or the DLL wrappers are x86 , you will see "Class not registered" errors. Usually, setting your project to x86 resolves this.
: Facilitating connections to local or remote OPC servers using URL schemes like Data Subscription opcnetapidll
Without OpcNetApi.dll , a developer would have to write complex interop code to talk to the COM interfaces directly. This process is error-prone, difficult to debug, and requires deep knowledge of DCOM (Distributed COM) settings. If your project is set to x64 but
Technically speaking, opcnetapidll acts as a or helper library. Its primary job is to marshal data between OPC clients and OPC servers across different process boundaries or even across network machines. In simpler terms, it translates the raw COM calls from your .NET application (like a C# based SCADA client) into a format that a legacy OPC server (written in C++) can understand, and vice versa. This process is error-prone, difficult to debug, and