Did you install help releated VFP files with your appliaction?
Check mskb #Q191223 and mskb #Q194196.

>I just test-installed a VFP 6 app on Vista and can't seem to make the context sensitive help work, not even F1. This works fine on XP.
>
>Can anyone confirm that this is an issue with VFP6 on Vista?
>