Get Trace Group Information

When given 0x21 as its FunctionCode argument, the NtTraceControl function gets information about a provider group. Microsoft’s name for this function code is not known. This note deals only with the function’s behaviour that is specific to this function code. The function’s general behaviour is here taken as assumed knowledge.

This function code supports the EnumerateTraceGuidsEx function for its information class TraceGroupQueryInfo (0x21). If the input buffer does not provide exactly the 0x10 bytes of a GUID, the function returns STATUS_INVALID_PARAMETER.

TO BE DONE?