Verify ActiveX presence and registration

An ActiveX installation on PC can be verified by finding its ProgID from OleClass property in the registry.

Retrieving version of VFP OLE DB provider

A version of VFP OLE DB provider installed on computer can be retrieved from provider itself or from its DLL through the registry.

Fix VFP file associations to open files in one VFP instance

The files associated with VFP are opened in a new instance of VFP when double-clicked or 'Open' verb is executed on them. It's configured in Windows not in VFP.