GETSCREEN works just like the MATLAB function getframe, but works on any monitor, not just the primary one. (Getframe gives an error if you use it on a figure displayed on your second monitor) Can also be used to take screenshots from any area of your display, whether or not it is a MATLAB figure.
Syntax is the same as getframe, and can be used to capture entire figures or axes, or a rectangular subarea of these. Can also be called using just a position vector to take a screenshot of that area of your display, regardless of whether it is a MATLAB figure or not.
Uses java.awt.robot to take screenshots, so it requires java.