>> Has anyone done a VFP Integration with Salesforce?
>
>Yes. We're using the WestWind Client Tools library to handle the work of connecting to the Salesforce REST API and also to manage JSON serialization. The results have been satisfactory so far. One nice thing is that the Salesforce REST API allows you to run simple queries against the SF database using the "/services/data/v51.0/query/" endpoint.

Thanks for your reply.
I also use WestWind Client Tools for automated E-Mailing (have for years).
Which components are you using? Are you able to synchronize Data between VFP and Salesforce?