BAT File to automatically ZIP/RAR files with specific extension?
 

I am looking for a BAT file to monitor a folder on my Windows machine that can specifically monitor the folder for a certain file extension, and when it finds a file with that extension, will automatically ZIP or RAR the file, then delete the file it compressed (this is a similar process to Adobe Distiller monitoring for *.ps files to change into PDF).

EDIT:
Seems I found that DOSRAR exists with every install of WinRAR, but now I need some help on the BAT part. The file I will be compressing will be constantly getting bigger (a Counter-Strike demo, to be exact) so therefor I can't set the BAT script to run with Windows Task Scheduler because attempting to RAR when the file is still growing wouldn't be any good. I need a process in the script that can check the filesize of the file (*.dem) and then check it again in X minutes/seconds and if FileSize1 < FileSize2 then checkAgain. Then once FileSize1 == FileSize2, run the action of RARing the file (shown below) and set FileSize1 == 0.

Could anybody be so kind to help me with this or turn me somewhere for help? Thanks!

Well, at least with Winrar, there is an option that will allow you delete the file that you have just archived. So I am guessing any script that watches a folder would be able to call Winrar with the appropriate command line to do that deletion. As for the actual script, I can't help you there I'm afraid.

EDIT: Refer to post 1, changed my topic/entry.