In Director we create a global variable named "isMouseDown". Assign a behavior to the ball sprite and use this variable to determine if user clicks on the ball sprite (isMouseDown = true) or not (isMouseDown = False).

We use the "rect" property of the ball sprite to test its location and the stage boundaries. "rect" is an array that has 4 elements: the left, top, right and bottom coordinates of the sprite.

In Director:

	on exitFrame
		if sprite("Ball").rect[1] <= 0 then
			sprite("Ball").LocH =
   sprite("Ball").LocH + 50
		end if
		if sprite("Ball").rect[2] <= 0 then
			sprite("Ball").LocV =
   sprite("Ball").LocV + 50
		end if
		if sprite("Ball").rect[3] >=
   640 then
			sprite("Ball").LocH =
   sprite("Ball").LocH - 50
		end if
		if sprite("Ball").rect[4] >=
   480 then
			sprite("Ball").LocV =
    sprite("Ball").LocV - 50
		end if
		if isMouseDown then
			ball_so.data.x = sprite("Ball").LocH
			ball_so.data.y = sprite("Ball").LocV
		end if
		go to the frame
	end 

The complete listing of this sample is shown in Listings 3 to 5.

Now, you can publish the project and run two instance of it. Drag the ball sprite and see the effect in other running instance.

What's Next?
You've just experienced some of the basic concepts of using FlashCom in Director. But all of those samples are client-side only. When you learn how to use server-side scripting with Director to receive from and send messages to it, the power of your multi-user applications will increase greatly.

For example, with server-side scripting you can manage users and verify them to accept or reject their connection request, and so on. Using authentication, you could give different users different roles in the system, assigning some users more power in the system than others. For example, think of our chat system extended to include a teacher and several students. The teacher would have the ability to correct false information and push additional material that the students might not have. In a more game-like environment, a "Game Master" might have the ability to control the positions of objects that the individual players do not have the right to move. By exploring the capabilities of the Flash Communication Server, and its use in Director, several of these types of applications can be built using the shared object model.

• Source Code