Sergey,

Thank you very much for your reply. I think I managed to figure out what was going on. The problem was that I didn't know when the Height property changed. The form was opened with DO FORM NOSHOW. In the form's Init method, I was setting its WindowState to 2 (maximized). I was expecting that the Height would change immediately. It didn't. I debugged the Form.Show event handling code. Inside there, the form still had its old height. But as soon as that code finished, the form's height changed as expected. So, I moved the code that cares about the form's height into the form's Activate method, which is fired after Show, and it worked.