Steps for Full Screen Flash Movie
1) First create your animation, presentation, e.t.c.
2) After that, select the first frame and then open the Actions panel (F9)
3) Click on the "+" sign to add a new item to the script.
4) Go to Global Functions > Browser/Network > fscommand and then type the following:
5) Test the Movie ( Ctrl+Enter) and Right-Click on the screen. You will notice that there 100% is ticked.
100 % quality is now maintained
6) Save your file and open the SWF file of your movie. Yow will be able to see your movie in Fullscreen mode! .
7) Press the Esc button to come back to the default mode.
You have now successfully created a Fullscreen Flash Movie!