>Can I access and write to the same table from both VFP6 and VFP9 apps?
>
>If I reindex the table in VFP9 will VFP6 still be able to use the index?

Yes you can as long as you don't use any new VFP9 data features, like BINARY indexes, VAR* fields, etc. Also some VFP6 indexes with variable key length may generate errors in VFP9 because of added checks for index key truncations.