API Commands

Is there any documentation or examples on how to use the commands.  I
tried to use the TickerCommand class but when I run my test class I get
an IVException: Error reading from the datasource '' in command
TickerCommand.  What datasource, I never said anything about a data
source.  The code I use is:

file = FlashFile.newFlashFile();
StandardContext context = new StandardContext();
Script script = new Script(1);
script.setMain();
file.setMainScript(script);
TickerCommand ticker = new TickerCommand();
ticker.doCommand(file, context, script, 1)

... Then I generate the SWF.

None of the classes in the command package are documented, so if there
is something else I am supposed to add to the context, I have no way of
knowing what it is?  And anyone answering, please dont say "feel free to
document them." Because documenting someone else code is an exercise in
futility.

Thanks



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