Creating an automatic refer button

[SupraT]

If this has been addressed before, sorry couldn't find anything on it.

I want to create a easy way for member to refer.

How do I create "buttons" for the members to put on their sites etc so when they click on the button, they get referred to my site, then register and the referring site/user gets credit automatically without having the person that is registering enter the referrerrrrrr's name?

This is perfect for competitions and such. I also have am using the Store Hack which will allow points for the refers.

Thanks

[SupraT]

Anyone on how to do this?