Gets or sets a value specifying whether a popup window is closed when an end-user presses the ESC key.
true, to close a popup window when the ESC key is pressed; otherwise, false.
The CloseOnEscape property specifies whether a popup window is closed when an end-user presses the ESC key.
If the PopupControlSettings.Windows collection is empty, the CloseOnEscape property is applied to the default popup window. Otherwise, the CloseOnEscape property specifies that the common behavior on an ESC key press applies to all popup windows from the PopupControlSettings.Windows collection. In this case, the CloseOnEscape property’s value can be overridden by using the PopupWindow.CloseOnEscape property of individual windows.