Accessing OPC Server from LabView

My version of LabView does not allow selection of an OPC server via a list box. Instead, I have to give it a URL that points to the server. In the list box in Sample Client, the name of the server is OPC ProgID. How would I express this as a URL?

The following format is required for OPC Connections from LabView:
opc://(Machine Name or IP)/(OPC ProgID of OPC Server)/(Fully Qualified OPC Item Name)

A local connection to the TOP Server for Tag 1 on Device1 on Channel1 would be:
opc://localhost/SWToolbox.TOPServer.V5/Channel1.Device1.Tag1