This question was posted in response to the following article: http://help.adobe.com/en_US/Flex/4.0/UsingSDK/WS2db454920e96a9e51e63e3d11c0bf69084-7da0.ht ml
Alert Control can be moved around the application windows by clicking the title bar area and dragging it. If you click the title bar just infront of the Title Text and start dragging you can move the Alert Control beyond the application. In this case the application locks as you can't access the Alert Control using mouse but using keyboard(Eg. ESC key). I'm wondering if there is a way we can control the position of the Alert Control so that it can't be dragged beyond the application window.
This is a known issue. As a workaround, you can add a move event handler to the Alert control and shift it back a few pixels so there is some titlebar to grab.