>This field is populated only at design-time in VFP and only used then. It is updated if you edit the class/form from one PC to another (changes in path). At run-time it does not use this path but uses the OLE registration in the registry.

You said it better than I did :).

But then if you move the whole project to a different box, and the ocx is not in the same location, it will not break but use registration to find it, and then write the newfound location into the field. IOW, it's mostly irrelevant, it looks it's just FYI and possibly also served as a "look there first", sort of path caching.