Used to calculate percent complete by comparing with CurrentStep. To update, call Update which will notify subscribers that this object has changed. For the best user experience, attempt to change this value as rarely as feasible so that the percentage doesn't appear to go down.
Requirements
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