app to monitor time editing office documents

Trying to write a time tracking app with the following behavior:

1. Lives in system tray (have seen all posts saying how to do this)
2. Monitors office apps (word, excel, visio, outlook, powerpoint)
3. Monitors document (or email) open and close events, timer times
amount of time spent editing document, pops up form to assign a
project, after assigning project, submit form and posts time entry with
project id and timer amount of time.
4. Stores project id with document so pre-populates project id next
time form comes up for this document.
5. Has start/stop buttons in system tray app to do a custom punch if
you are doing work it can't monitor.
6. future monitors other programs like telnet, etc. too.

Any ideas how to monitor the office apps, open/close document events,
pop up a form based on these, and store project id with a document?

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