Note
Access to this page requires authorization. You can try signing in or changing directories.
Access to this page requires authorization. You can try changing directories.
Specifies the source of the real-time data.
Syntax
PDH_FUNCTION PdhSetDefaultRealTimeDataSource(
[in] DWORD dwDataSourceId
);
Parameters
[in] dwDataSourceId
Source of the performance data. This parameter can be one of the following values.
| Value | Meaning |
|---|---|
|
The data source is the registry interface. This is the default. |
|
The data source is a WMI provider. |
Return value
If the function succeeds, it returns ERROR_SUCCESS.
If the function fails, the return value is a system error code or a PDH error code. The following is a possible value.
| Return code | Description |
|---|---|
|
The parameter is not valid. |
Remarks
The term real-time as used in the description of this function does not imply the standard meaning of the term real-time. Instead, it describes the collection of performance data from a source providing current information (for example, the registry or a WMI provider) rather than from a log file.
If you want to query real-time data from WMI, you must call PdhSetDefaultRealTimeDataSource to set the default real-time data source. You must call this function before calling any other PDH API function.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows XP [desktop apps only] |
| Minimum supported server | Windows Server 2003 [desktop apps only] |
| Target Platform | Windows |
| Header | pdh.h |
| Library | Pdh.lib |
| DLL | Pdh.dll |