Used to create performance categories and configure performance counters. Extensibility point in the WiX XML Schema. Schema extensions can register additional elements at this point in the schema. Unique identifier in your installation package for this performance counter category. Name for the performance counter category. If this attribute is not provided the Id attribute is used as the name of the performance counter category. Optional help text for the performance counter category. Flag that specifies whether the performance counter category is multi or single instanced. Default is single instance. DLL that contains the performance counter. The default is "netfxperf.dll" which should be used for all managed code performance counters. Function entry point in to the Library DLL called when opening the performance counter. The default is "OpenPerformanceData" which should be used for all managed code performance counters. Function entry point in to the Library DLL called when closing the performance counter. The default is "ClosePerformanceData" which should be used for all managed code performance counters. Function entry point in to the Library DLL called when collecting data from the performance counter. The default is "CollectPerformanceData" which should be used for all managed code performance counters. Default language for the performance category and contained counters' names and help text. Extensibility point in the WiX XML Schema. Schema extensions can register additional attributes at this point in the schema.