asterisk users - Feb 2005 - return code of app in dialplan

Hi,
I'll probably kick myself when I read the replies to this...

How do I test the return code of an app in the dialplan?

I need to test if the app, MYSQL() in this case, returned -1 or 0.  
It's easy to see after-the-fact in the log output, but I need the
result in the dialplan, I just can't find which variable stores the
actual return-code.

Thanks!

Gary Reuter wrote:
> I need to test if the app, MYSQL() in this case, returned -1 or 0.  
You can't. If it returns -1, execution stops and if there is a channel 
active, it is hung up.