crosoft Outlook implementation, this window has a caption of "ShortcutBar" and 
a class name of "rctrl_renwnd32" - this class is used as a general container in Outlook.</p></li><li><strong>The Scroll ViewPort</strong><p>This window is responsible for clipping the areas of the ListBar which can't be seen as 
the ListBar is scrolled up and down. When the container resizes this window, it instructs it 
to detect whether the ListBar is bigger than its client area, so it can then determine whether to 
display th