+A scroll event holds information about events sent from stand-alone
+scrollbars, spin-buttons and sliders. Note that starting from wxWindows 2.1,
+scrolled windows send the \helpref{wxScrollWinEvent}{wxscrollwinevent} which
+does not derive from wxCommandEvent, but from wxEvent directly - don't confuse
+these two kinds of events and use the event table macros mentioned below only
+for the scrollbar-like controls.