Clicking the close button causes the DesktopAlertClosing event to fire; if the event is not canceled, the desktop alert window is closed, and the DesktopAlertClosed event is fired.
Note: Changing properties of the UltraDesktopAlert component when one or more desktop alert windows are open is not recommended; such changes will not be fully applied for desktop alert windows that are currently open. The HasOpenWindows property should be used to determine whether any desktop alert windows are currently open for this instance before changing property values.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2