AnnCrossProductObject overrides HitTest to fine tune the hit test return value. This is the value returned if the hit-testing succeeded on the second ruler (the ruler between SecondStartPoint and SecondEndPoint).
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2