SetupQueryFileLogW function (setupapi.h)
[This function is available for use in the operating systems indicated in the Requirements section. It may be altered or unavailable in subsequent versions. SetupAPI should no longer be used for installing applications. Instead, use the Windows Installer for developing application installers. SetupAPI continues to be used for installing device drivers.]
The SetupQueryFileLog function returns information from a setup file log.
Syntax
WINSETUPAPI BOOL SetupQueryFileLogW(
[in] HSPFILELOG FileLogHandle,
[in] PCWSTR LogSectionName,
[in] PCWSTR TargetFilename,
[in] SetupFileLogInfo DesiredInfo,
[in, out] PWSTR DataOut,
[in] DWORD ReturnBufferSize,
[in, out] PDWORD RequiredSize
);
Parameters
[in] FileLogHandle
Handle to the file log as returned by SetupInitializeFileLog.
[in] LogSectionName
Optional pointer to the section name for the log file in a format that is meaningful to the caller. You should use a null-terminated string. Required for non-system logs. If no LogSectionName is specified for a system log, a default is supplied.
[in] TargetFilename
Name of the file for which log information is desired. You should use a null-terminated string.
[in] DesiredInfo
Indicates what information should be returned to the DataOut buffer. This parameter can be one of the following enumerated values.
If the value of DesiredInfo is greater than SetupFileLogOtherInfo the function will fail, and GetLastError will return ERROR_INVALID_PARAMETER.
[in, out] DataOut
Optional pointer to a buffer in which this function returns the requested information for the file. You should use a null-terminated string. The null-terminated string should not exceed the size of the destination buffer. You can call the function once to get the required buffer size, allocate the necessary memory, and then call the function a second time to retrieve the data. See the Remarks section. Using this technique, you can avoid errors due to an insufficient buffer size. Not all information is provided for every file. An error is not returned if an empty entry for the file exists in the log. This parameter can be NULL.
[in] ReturnBufferSize
Size of the DataOut buffer, in characters. This includes the null terminator. If the buffer is too small and DataOut is specified, data is not stored in the buffer and the function returns zero. If DataOut is not specified, the ReturnBufferSize parameter is ignored.
[in, out] RequiredSize
Optional pointer to a variable that receives the required size of DataOut, in characters. This number includes the null terminator.
Return value
If the function succeeds, the return value is a nonzero value.
If the function fails, the return value is zero. To get extended error information, call GetLastError.
Remarks
If this function is called with a DataOut of NULL and a ReturnBufferSize of zero, the function puts the buffer size needed to hold the specified data into the variable pointed to by RequiredSize. If the function succeeds in this, the return value is a nonzero value. Otherwise, the return value is zero and extended error information can be obtained by calling GetLastError.
If the value of DesiredInfo is greater than SetupFileLogOtherInfo the function will fail, and GetLastError will return ERROR_INVALID_PARAMETER.
Note
The setupapi.h header defines SetupQueryFileLog as an alias that 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 is not encoding-neutral can lead to mismatches that result in compilation or runtime errors. For more information, see Conventions for Function Prototypes.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows XP [desktop apps only] |
| Minimum supported server | Windows Server 2003 [desktop apps only] |
| Target Platform | Windows |
| Header | setupapi.h |
| Library | Setupapi.lib |
| DLL | Setupapi.dll |