Returns -1 if this edge must be on an upper bus than the given one or 1 if it must be on a lower bus. Value of 0 means that the edges do not intersect.
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