iPlots and mouse clicks

Hi,

I'm investigating the iPlots package as a teaching aid, and I'd like  
to be able to detect mouse clicks (with x-y position) in the plotting  
window. I can't see how to do this - the only event loop that is  
illustrated in the examples uses iset.sel.changed(). Is there anyone  
out there who has made use of the iPlots event loop functionality and  
might be able to give me some tips?

Thanks, and apologies if this is not the correct list,

Yan Wong
Leeds