Bruce,

that's it! I won't waste any more energy in fuzzing around with the VFP main screen. I changed my application framework so it uses a TL form as main screen with a hidden VFP main screen. It works just fine! No idea why I haven't done this before.

Thank you for your input! That is why I like UT: it makes you change your own point of view by explaining your problem, and together with questions and suggestions from experianced pros you can achieve goals you never would reach on your own. This is network thinking.