Gary,

>>I think I prefer the form property. In your fieldvalid, if the zip doesn't exist, simply set thisform.lZipNotFound to True and return True too. This will allow the control the lose focus but will record the problem by setting thisform.lZipNotFound to True. Then in the control's lostfocus event method, check the value of thisform.lZipNotFound and if it is True, call your modal child form from the lostfocus. You shouldn't experience the same problem you encountered in the valid in the control's lostfocus.<<

Thanks for the detailed suggestions. I'll give this some study, and decide how to best handle this with my current program logic (or perhaps even change the program logic).

Mel Cummings