Tracking user exits and returns

[Brad Allen]

At 7:30 PM +1100 3/31/02, Michael J. Lew wrote:
>I am planning a full evaluation of the software and associated notes 
>from the point of view of both usability and learning outcomes and 
>would like a reasonably full audit-trail recording the students' 
>actions and results. This is, of course, very straightforward for 
>the Rev bit... but how can I record when the students switch to the 
>other package and how do I know when they switch back to my Rev 
>simulation? I expected that I could use closeStack and openstack 
>messages but no good. They don't seem to be sent when the user 
>switches to and from another program. Any suggestions?

Capturing resumeStack and suspendStack messages should do it.
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