Is it possible to make the modal popup extender auto-resizable like the "Quick reply" on this forum? the main reason i want this is so that if a popup has a height of 700 px and the screen resolution is 600px high, it  will auto fit to the screen.

Thanks.

Hi,

You can define showing event to reset the size of panel. 

    function pageLoad()
    {
        $find('programmaticModalPopupBehavior').add_showing(onshowing);
    }
   
    function onshowing()
    {
        $find('programmaticModalPopupBehavior')._foregroundElement.style.height=XX;
        $find('programmaticModalPopupBehavior')._foregroundElement.style.width=XX;

    }