Program or script to monitor local files

I would like to find a program or script (preferably VBSCRIPT, possibly PERL) to monitor local files on a Windows NT Server.

As an example, I would like to monitor a specific local directory (on an NTFS partition) for the existance of ANY file. If the file remains in that directory for a specific length of time, I would like to create an email alert.

Potentially, I may like to use more advanced features such as specific file types or names with certain characters or triggering different events.

BTW, I use a program called BLAT for sending SMTP mail via command prompt.

Any suggestions?
Sample code?

Regards,
Brian Erdelyi