examples accepting appleevents

[kee nethery]

Can someone point me to where I might go to see an example of one  
stack communicating with another stack via appleevents (on MacOSX)?  
I'm not exactly sure how to pass data via appleevents and have the  
other app catch them and reply back.

Want to pass the data that would be needed to send an email message  
and then get back a response saying the email was sent.

I know this is simple, just have not figured it out. I can send  
commands to pre-existing apps and make them sing and dance. But I've  
no clue how to send commands when there is no dictionary.

Thanks in advance,
Kee Nethery