Starting an Extension on Startup

[George]

I'm writing an extension to Thuban, and what I want to be able to do is 
have the extension start working as soon as Thuban is loaded - similar 
to what I would have done with a startup script in Arcview 3. To do this 
I need a copy of the context object but there doesn't seem to be a way 
of getting this other than wait until it's passed as a result of the 
menu item being clicked.

Am I correct in thinking this?

Regards,

George