hey this macbook has a built in camera and mic, now just for experimental purposes, can i record and sounds via this mic into logic?

i know it wont be good quality but just for experimental purposes.

and also how do i do it?

Yes. The track in my profile was recorded that way.
Just set up an audio track then click the R button.
thanks it worked for about 3 goes and now when i press record all iget is a high pitched feed back noise and my amp is turned off, do you know why this is?