Scaling-down a dialog when moved to another screen

[ssimop]

I designed a dialog on a 17" (1280x1024) computer screen which takes all the height o this screen. Then I moved this dialog on a 14" laptop (1366x768) screen. As a matter of fact the dialog looses about 12% of its height from bottom. I wonder whether there exists a simple way to scale-down the dialog, when moved to the laptop. Thanks in advanced for any advice.