Risris!
Let me see if I can help. From what I understand you want to be able to make an attachment for your handmade pins. Is that right?
I did a Google search for making the pin out of wire and didn't find much, but this is a video of how to make a pin out of a paper clip and it shows how to bend the wire into the shape for a pin. The only thing I would add is that you will want the pin to slide into and out of fabric so you will want to file it to a point before bending it into it's final shape.
http://www.metacafe.com/watch/825628/make_safty_pin_from_a_paperclip/
I hope this helps. Like Jeni said, if you could show us a picture we would understand what you need to know better and could likely help you better. Also, we'd love to see what you're making! There are a lot of very talented and caring people here who will be glad to answer any questions you have. I'm looking forward to seeing you here often!
Pam
It is only with the heart that one can see rightly, what is essential is invisible to the eye.
Antoine de Saint-Exupery