      *  @param increase Whether the page scroll is up (<code>true</code>) or
      *  down (<code>false</code>). 
      * 
-     *  @see mx.components.baseClasses.FxTrackBase#page()
-     *  @see mx.components.baseClasses.FxTrackBase#setValue()
+     *  @see mx.components.baseClasses.TrackBase#page()
+     *  @see mx.components.baseClasses.TrackBase#setValue()
      *  @see mx.core.IViewport
      *  @see mx.core.IViewport#verticalScrollPosition
      *  @see mx.core.IViewport#getVerticalScrollPositionDelta()     

//
////////////////////////////////////////////////////////////////////////////////

package mx.components
{
import mx.components.baseClasses.FxScrollBar;
import mx.core.ILayoutElement;
import mx.core.IViewport;
import mx.core.ScrollUnit;
import mx.events.PropertyChangeEvent;
import mx.events.ResizeEvent;
import mx.layout.LayoutElementFactory;

[IconFile("FxVScrollBar.png")]

/**
 *  The FxVScrollBar (vertical ScrollBar) control lets you control
 *  the portion of data that is displayed when there is too much data
 *  to fit vertically in a display area.
 * 
 *  <p>Although you can use the FxVScrollBar control as a stand-alone control,
 *  you usually combine it as part of another group of components to
 *  provide scrolling functionality.</p>
 *  

    }
    
    /**
     *  Returns the position of the thumb button on an VScrollBar control, 
     *  which is equal to the <code>localY</code> parameter.
     * 
     *  @param localX The X position relative to the scrollbar control.
