+overview = """<html><body>
+A listbox is used to select one or more of a list of
+strings. The strings are displayed in a scrolling box, with the
+selected string(s) marked in reverse video. A listbox can be single
+selection (if an item is selected, the previous selection is removed)
+or multiple selection (clicking an item toggles the item on or off
+independently of other selections).
+</body></html>
+"""