How to compress data to send it with email

I am working on an application that needs a compressed file to be sent allong with the email. I can send the email successfully but what I want is to attach a file in COMPRESSED format with my email. ....please any one help me!!!开发者_高级运维

thanx in advance......

---

look for a zip library (available in c, c#, I don't know about iphone though.. but I bet there is something:

google it: