Does anybody know who a make the button for answer call/next song/stop that work for the iphone?

I maid a headphone(speaker/mic) and it's working.I found THIS, To make the remote contro adapter(free), but I can't do it(need a PIC that you can get a free sample if your country is in the "delivery list".

Anyway... I appreciate your help to make the button without the PIC.:hack:

BTW this is the simple pinout for the iphone headphone: