The time range between the start and end of this session, or the last message logged if the session ended unexpectedly. Formatted as a string in HH:MM:SS format.
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