Responsive with windowsforms

Good day, maybe any people know how to do a responsive design using windows and attaching a form?

I try to create a window like: w3 = dhxWins.createWindow(“w3”, ‘10em’, ‘20em’, ‘20em’, ‘20em’); but not found, other idea?

Thanks.

Hello
There is no procentage dimentions in the current dhtmlx version, only px

Thanks