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.
Handling the "handshake" between your application and the server, including maintaining the connection state. opcnetapidll
Use a URL (like opcda://localhost/Vendor.ServerName ) to connect. Create a Subscription: Group the tags you want to monitor. If your project is set to x64 but