How to call one .swf file in another .swf file?

Hi all,

     I am new to flash and ActionScript3.0. Presently, I am using flash CS3 and the code I need is in ActionScript 3.0.


     Suppose, I have a .swf file(viz., file1.swf). Now, i am developing one more .swf file(viz., file2.swf), in which I need

to execute file1.swf when a CLICK event is listened on button present in second file(i.e., file2.swf).

       In how many ways, we can get this.Please reply me if you know this.

And, please I need code very urgently.
Help me.