PdhEnumLogSetNamesA function (pdh.h)
Enumerates the names of the log sets within the DSN.
PDH_FUNCTION PdhEnumLogSetNamesA( [in] LPCSTR szDataSource, [out] PZZSTR mszDataSetNameList, [in, out] LPDWORD pcchBufferLength );
Null-terminated string that specifies the DSN.
Caller-allocated buffer that receives the list of null-terminated log set names. The list is terminated with a null-terminator character. Set to NULL if the pcchBufferLength parameter is zero.
[in, out] pcchBufferLength
Size of the mszLogSetNameList buffer, in TCHARs. If zero on input, the function returns PDH_MORE_DATA and sets this parameter to the required buffer size. If the buffer is larger than the required size, the function sets this parameter to the actual size of the buffer that was used. If the specified size on input is greater than zero but less than the required size, you should not rely on the returned size to reallocate the buffer.
If the function succeeds, it returns ERROR_SUCCESS.
||The size of the mszLogSetNameList buffer is too small to contain all the data. This return value is expected if pcchBufferLength is zero on input. If the specified size on input is greater than zero but less than the required size, you should not rely on the returned size to reallocate the buffer.|
||A parameter is not valid. For example, on some releases you could receive this error if the specified size on input is greater than zero but less than the required size.|
You should call this function twice, the first time to get the required buffer size (set mszLogSetNameList to NULL and pcchBufferLength to 0), and the second time to get the data.
The pdh.h header defines PdhEnumLogSetNames as an alias which automatically selects the ANSI or Unicode version of this function based on the definition of the UNICODE preprocessor constant. Mixing usage of the encoding-neutral alias with code that not encoding-neutral can lead to mismatches that result in compilation or runtime errors. For more information, see Conventions for Function Prototypes.
|Minimum supported client||Windows XP [desktop apps only]|
|Minimum supported server||Windows Server 2003 [desktop apps only]|