>I don't see how it would work in any VFP version because there's no connection between those 2 EXEs.

I agree -- each has its own process and the _SCREEN and _VFP variables are independent. To solve your problem, you will need a third process that is external to both that runs as a server to manage the active form. You could alternatively, write to the registry or to a file the active form, but you would need to work out a way to know which process it originated from.

I would think a 3rd server process that holds the _VFP.Activeform reference would be better (it has the originating process and the form).