>>>BTW, one funny thing here - on my form I only have 3 grids, nothing more. Now, in order to avoid problem with Preview and grids documented in my FAQ should I put an invisible button on the form to set focus to? But if it's invisible, would I be able to set focus to it?
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>>Most likely not, but you can make it visible right before preview, set focus on it and make invisible after preview.
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>This doesn't work, for some reason. The idea of moving the button outside the visible portion of the screen doesn't work either. Perhaps I really need to have the button visible and on the form.

Did you try DOEVENTS before Button.Setfocus?