I have an app that puts log messages in a specific file (it doesn't send them to the windows event logs).

How can I have bigbrother alert me if specific messages end up in that file?

In the unix/windows world, I've done this many times... an external script runs which looks at all entries in the log file since the last execution (using an executable caled
logtail. (this way the alert only hits one time)...if something bad is found, a script then sends the alert to the bigbrother host.

How do I do the same kind of thing under windows?