This directory contains examples for OPC client and subscriber development in Visual Basic (the "classic" VB 6.0). The examples cover OPC Data Access (OPC DA), OPC Alarms&Events (OPC A&E), OPC XML, and OPC Unified Architecture (OPC UA) specifications, including OPC UA PubSub. They are supported on Microsoft Windows.

The examples work with our sample servers and publishers. Most of them reside on the Web; OPC "Classic" servers for Windows are installed using the OPC Studio Setup program.

Useful links:

• OPC client and subscriber examples in the documentation.
• OPC client and subscriber examples in Visual Basic on GitHub.
• OPC Studio Setup program
• Getting Started under COM.
• Making a first COM application in VB6.
• Making a first UA application in VB6.
• OPC Labs Knowledge Base.

Need help, or missing some example? Ask us for it on our Online Forums! You do not have to own a commercial license in order to use Online Forums, and we reply to every post.