These are after any necessary calculation or interpolation. To get a value set, use the Calculate method on a metric. For best performance, specify the least accurate interval you need to graph.
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