How to extract common ares from overlapping shapefiles?

I have loaded some shapefiles through shaperead command. So I have a map with overlapping shapefiles. I want the common areas of the overlapping to be extracted to a new shapefile.

[Image Analyst]

Is that all the information you can possibly provide? See http://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer