How to send attachment Through EMAIL

How can i send a file (excel file, word file or any other) as a attachment by using a PHP "MAIL" functioln.

Or

I have a one file like abc.doc. I want to email that file to (e.g.) abc@yahoo.com

How can i do this.

plz reply

Eshban

if anyone need help regading this topic, then mail me at eshban@gmail.com

I will give tell and send you the whole procedure

bye