title: the status of a checkbox in Cocoa
body: <p>In Interface Builder I made a checkbox and a textbox. When the user checks the checkbox I want a message to appear in the textobx that says "the checkbox is checked." If the box is unchecked I want a message to appear in the textbox that says "the check box is unchecked." The problem is that I don't know how to get the status of the checkbox.</p>