How do I convert an instrument cable into a mic in jack?

Sup guys. I was wondering if I can convert the instrument cable I have into a line in or mic in (I have both the pink and blue hole in the back of my comp).

Lemme know :wink:

Please don’t double post. It just confuses everybody.

http://audacityteam.org/forum/viewtopic.php?f=27&t=7354

Koz