Refreshing a WMI Performance counter

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hisham10

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Feb 20, 2006
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Hi,

How can i refresh a WMI Performance counter?

This is my code:

CComPtr< IEnumWbemClassObject > enumerator;

hr = service->ExecQuery( L"WQL", L"SELECT * FROM Win32_PerfFormattedData_PerfOS_Processor, WBEM_FLAG_FORWARD_ONLY, NULL,enumerator );

ULONG retcnt;
CComPtr< IWbemClassObject > processor;
hr = enumerator->Next( WBEM_INFINITE, 1L, &processor, &retcnt );

now from the processor i can get "InterruptsPerSec" for example.

but if i want the average of it for an interval, i should sleep for an interval and after that refresh the performance counter to get the new value.

To refresh i need a IWbemRefresher. How can i get one from IWbemClassObject?



Thanks alot

Hisham
 
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