Function of close button in 3gl object DsCmwindow

Hello Everyone,

I created a parent window (DsCmwindow) using create object. Whenever I am clicking on it's close button, nothing happens and window just remains open.

Any clue, what needs to be done in order to enable this functionality ?

Also, when creating any window, how can we get details about screen resolution ? how can we get width and height of the parent window in pixel ?

Thanks,
Vishal