>>When I asked the parameter question in the discussion group of the framework I use (Visual Extend), I got an interesting alternative to your suggestion: instead of a private variable, I can use properties of the calling form, with ThisForm! The calling form would still be active in the DataEnvironment.OpenTables() event. At least, that was the claim.
>
>Sorry, the suggestion was not to use ThisForm, but _screen.ActiveForm.
>
>Hilmar.

That is correct, and some related threads are

Message#278095
Message#339977