Auto Compression of Attachements sent with email

[Pritam]

I am working on a small project idea. The objective of this is to compress any attachements present in a email (when the user clicks the 'Send' button). Before the email is sent the program(dll) has to compress the attachements and reattach them to the mail. This will significantly reduce the bandwidth being used by emails which are sent in n numbers.

At 'Siemens' we use Powerarchiver as a standard zip tool.
I would like your help in this area as how to integrate powerarchiver with Outlook.

Awaiting your reply,