Schmidt, thanks. It's working of course, but it's still a timer. Your version is theoretically more safely, because I can potentially get exception after disabling whole form if code will try to access controls on that form.
Guys, don't quarrel.
I regret that I touched on the topic, where you have terminological misunderstandings by each other, not in general.
I any case, I'll beter go read book.
Thanks to anyone who came to my thread.