Move current row pointer to the previous row under the current ActiveIndex. If there were no previous rows to move back to, the StartOfTable flag will be set to true.
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