  *  @see spark.skins.spark.HScrollBarSkin
  *  @see spark.skins.spark.HScrollBarThumbSkin
  *  @see spark.skins.spark.HScrollBarTrackSkin
+ *
+ *  @includeExample examples/HScrollBarExample.mxml
+ * 
  *  @langversion 3.0
  *  @playerversion Flash 10
  *  @playerversion AIR 1.5

    

    /**
     *  If <code>viewport</code> is not null, 
     *  changes the horizontal scroll position for a page up or page down operation
     *  by scrolling the viewport.
     *  This method calculates the amount to scroll by calling the 
     *  <code>IViewport.getHorizontalScrollPositionDelta()</code> method 
     *  with either <code>flash.ui.Keyboard.PAGE_UP</code> 
     *  or <code>flash.ui.Keyboard.PAGE_DOWN</code>.
     *  It then calls the <code>setValue()</code> method to 
     *  set the <code>IViewport.horizontalScrollPosition</code> property 
     *  to the appropriate value.
     *
     *  <p>If <code>viewport</code> is null, 
     *  calling this method changes the scroll position for 
     *  a page up or page down operation by calling 
     *  the <code>changeValueByPage()</code> method.</p>
     *
     *  @param increase Whether the page scroll is up (<code>true</code>) or
     *  down (<code>false</code>). 
     * 
     *  @see spark.components.supportClasses.ScrollBarBase#changeValueByPage()
     *  @see spark.components.supportClasses.Range#setValue()

 *        </tr>
 *     </table>
 *
 *  @mxml
 *  <p>The <code>&lt;s:HScrollBar&gt;</code> tag inherits all of the tag 
 *  attributes of its superclass and adds the following tag attributes:</p>
