Parameters
- key
- The Key of the event metric definition to check (composed of the metrics system, category name, and counter name combined as a single string).
Return Value
true if the collection contains an element with the key; otherwise, false.
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