>SET SEPARATOR is applicable only to @SAY / @GET (as I understand things), so your test is not really valid.
>Also, this limitation may not help you, of course.

This is something that need to be improved in Visual FoxPro.

I have a bunch of datetime fields. Suddenly, the client said he wanted to avoid to see the seconds, so I just SET SECONDS OFF in my form load.

But, for separators, if I understand correctly, there is no way to do that. So, if the client change mind the next month, I will have to modify those input mask property for forms and reports.