Handling a Popup control through programming The popup being a control of the page, you have the ability to access: the page controls from the popup. the popup controls from the page. Manipulating Popup controls programmatically (prefix syntax) The popup being a control of the page, you have the ability to access: the page controls from the popup. the popup controls from the page. Popup control events The following events appear by default in the WEBDEV code editor: Popup control properties The Popup control The Popup control is a control used to associate a popup with a page. This popup, displayed from the page into which it is inserted, is used to easily establish a dialog with the user.