In this lab, you will need the following classes:

You can get the code for those classes by clicking on the above, and then use Save As from File menu of Netscape to get copies of your own. Please make sure that those files are saved in your directory for this course.

Now press the most right button, which is blue and looks like a file cabinet, in the button row on VisualWork window to pop up a File List window. At the top row of this window, type in *.st and return. Three files which were just down loaded by you should appear below. Click at UI.st to highlight it, and use the middle mouse button to select file in. After you filled in this code, do the left two files in same way.