KEPware Automation DLL installation instructions: To use the KEPware Automation DLL in your Visual Basic project: 1) In the VB IDE, Select "Project/References". 2) If you have been using another vender s automation dll, uncheck it. For example, uncheck "OPC Automation 2.0" for the OPC Foundation s automation dll. 3) Check "KEPware OPC Automation 2.0". 4) Recompile your VB project. If you have been using the OPC Fondation s automation dll, you should not need to make any changes to the VB source code.