>>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.

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.