Very confused today!! Sprite in Flex is frequently used. Label or Text(mx.contorls) also is the class ofen used. Try as I say,you will see a very strange thing ocurring. you instantialize this two classes and then use Sprite instance to draw a rectangle which covers Label instance,and then add an eventlistener to Sprite,mouse Click event,for instance.finally,you will find out that it doesn't response to your click. How strange it is!!!!!