Hi,
Yes.... I did what you mentioned. Its work fine actually, min, max and close button is are appear in the right place. The problem only occur if there is any normal window that minimized. I guess it is because the form after the minimized one is not getfocus. When the problem uccurs, I just need to launch another form, those 3 buttons will come back. But I think it should not be .... right? How to solve it?

Thank you