How to obtain OPC Classic server registration information

In some situations it might be necessary to obtain detailed information about how the OPC Classic server is registered in the system. The information is stored in Windows registry, and this article explains how to export this information for further inspection and analysis.

Note: On 64-bit Windows system, there are portions of the registry that are for 64-bit and 32-bit subsystems. Also, the view of the registry that you get depends on whether you run the 64-bit or 32-bit version of the REGEDIT program. The description above ignores the possible differences between the 32-bit and 64-bit parts. In some cases, there may be a need to dig deeper, and inspect the 32-bit and 64-bit parts separately.