This method works the same as the CompareTo method on the DateTime structure, with the difference that it understands the concept of empty date values as implemented by SmartDate.
Target Platforms: Windows 10, Windows 8.1, Windows 8, 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