How do I check for PROGRAM idle time, as opposed to SYSTEM idle time?

Question

I have a program that occasionally needs to scan some directories recursively (an improvement for this part of the program is in the pipeline, but won\'t be ready for a while).

Answer 1

...but I would prefer to activate the function even when the user is working with other programs on the same computer. This way, if he switches to another program, I could catch up on the scanning I need to do.

Stop the scanning in Application.OnActivate and resume in Application.OnDeactivate.