MACROMEDIA FLASH 8-LEARNING ACTIONSCRIPT 2.0 IN FLASH Manual page 712

When you use the Control > Test Movie command to test SWF files that implement
keyboard controls (tabbing, keyboard shortcuts created using
on), select Control > Disable Keyboard Shortcuts. Selecting this option prevents the
authoring environment from "grabbing" keystrokes, and lets them pass through to the player.
For example, in the authoring environment, Control+U opens the Preferences dialog box. If
your script assigns Control+U to an action that underlines text onscreen, when you use Test
Movie, pressing Control+U opens the Preferences dialog box instead of running the action
that underlines text. To let the Control+U command pass through to the player, you must
select Control > Disable Keyboard Shortcuts.
When you use a non-English application on an English system, the Test Movie
command fails if any part of the SWF file path has characters that cannot be represented
with the MBCS encoding scheme. For example, Japanese paths on an English system
do not work. All areas of the application that use the external player are subject to
this limitation.
The Debugger shows a hierarchical display list of movie clips currently loaded in Flash Player.
Using the Debugger, you can display and modify variable and property values as the SWF file
plays, and you can use breakpoints to stop the SWF file and step through ActionScript code
line by line.
You can use the Debugger in test mode with local files, or you can use it to test files on a web
server in a remote location. The Debugger lets you set breakpoints in your ActionScript that
stop Flash Player and step through the code as it runs. You can then go back to your scripts
and edit them so that they produce the correct results.
After it's activated, the Debugger status bar displays the URL or local path of the file, tells
whether the file is running in test mode or from a remote location, and shows a live view of
the movie clip display list. When movie clips are added to or removed from the file, the
display list reflects the changes immediately. You can resize the display list by moving the
horizontal splitter.
712 Debugging Applications
Key.addListener()
, and so