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VerInstallFileW function (winver.h)

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Installs the specified file based on information returned from the VerFindFile function. VerInstallFile decompresses the file, if necessary, assigns a unique filename, and checks for errors, such as outdated files.

Syntax

DWORD VerInstallFileW(
  [in]      DWORD   uFlags,
  [in]      LPCWSTR szSrcFileName,
  [in]      LPCWSTR szDestFileName,
  [in]      LPCWSTR szSrcDir,
  [in]      LPCWSTR szDestDir,
  [in]      LPCWSTR szCurDir,
  [out]     LPWSTR  szTmpFile,
  [in, out] PUINT   puTmpFileLen
);

Parameters

[in] uFlags

Type: DWORD

This parameter can be one of the following values. All other bits are reserved.

Value Meaning
VIFF_FORCEINSTALL
0x0001
 Installs the file regardless of mismatched version numbers. The function checks only for physical errors during installation.
VIFF_DONTDELETEOLD
0x0002
 Installs the file without deleting the previously installed file, if the previously installed file is not in the destination directory.

[in] szSrcFileName

Type: LPCTSTR

The name of the file to be installed. This is the filename in the directory pointed to by the szSrcDir parameter; the filename can include only the filename and extension, not a path.

[in] szDestFileName

Type: LPCTSTR

The name VerInstallFile will give the new file upon installation. This file name may be different from the filename in the szSrcFileName directory. The new name should include only the file name and extension, not a path.

[in] szSrcDir

Type: LPCTSTR

The name of the directory where the file can be found.

[in] szDestDir

Type: LPCTSTR

The name of the directory where the file should be installed. VerFindFile returns this value in its szDestDir parameter.

[in] szCurDir

Type: LPCTSTR

The name of the directory where a preexisting version of this file can be found. VerFindFile returns this value in its szCurDir parameter.

[out] szTmpFile

Type: LPTSTR

The name of a temporary copy of the source file. The buffer should be at least _MAX_PATH characters long, although this is not required, and should be empty on input.

[in, out] puTmpFileLen

Type: PUINT

The length of the szTmpFile buffer. This pointer must not be NULL.

When the function returns, lpuTmpFileLen receives the size, in characters, of the data returned in szTmpFile, including the terminating null character. If the buffer is too small to contain all the data, lpuTmpFileLen will be the size of the buffer required to hold the data.

Return value

Type: DWORD

The return value is a bitmask that indicates exceptions. It can be one or more of the following values. All other values are reserved.

Return code/value Description
VIF_ACCESSVIOLATION
0x00000200L
 A read, create, delete, or rename operation failed due to an access violation.
VIF_BUFFTOOSMALL
0x00040000L
 The szTmpFile buffer was too small to contain the name of the temporary source file. When the function returns, lpuTmpFileLen contains the size of the buffer required to hold the filename.
VIF_CANNOTCREATE
0x00000800L
 The function cannot create the temporary file. The specific error may be described by another flag.
VIF_CANNOTDELETE
0x00001000L
 The function cannot delete the destination file, or cannot delete the existing version of the file located in another directory. If the VIF_TEMPFILE bit is set, the installation failed, and the destination file probably cannot be deleted.
VIF_CANNOTDELETECUR
0x00004000L
 The existing version of the file could not be deleted and VIFF_DONTDELETEOLD was not specified.
VIF_CANNOTLOADCABINET
0x00100000L
 The function cannot load the cabinet file.
VIF_CANNOTLOADLZ32
0x00080000L
 The function cannot load the compressed file.
VIF_CANNOTREADDST
0x00020000L
 The function cannot read the destination (existing) files. This prevents the function from examining the file's attributes.
VIF_CANNOTREADSRC
0x00010000L
 The function cannot read the source file. This could mean that the path was not specified properly.
VIF_CANNOTRENAME
0x00002000L
 The function cannot rename the temporary file, but already deleted the destination file.
VIF_DIFFCODEPG
0x00000010L
 The new file requires a code page that cannot be displayed by the version of the system currently running. This error can be overridden by calling VerInstallFile with the VIFF_FORCEINSTALL flag set.
VIF_DIFFLANG
0x00000008L
 The new and preexisting files have different language or code-page values. This error can be overridden by calling VerInstallFile again with the VIFF_FORCEINSTALL flag set.
VIF_DIFFTYPE
0x00000020L
 The new file has a different type, subtype, or operating system from the preexisting file. This error can be overridden by calling VerInstallFile again with the VIFF_FORCEINSTALL flag set.
VIF_FILEINUSE
0x00000080L
 The preexisting file is in use by the system and cannot be deleted.
VIF_MISMATCH
0x00000002L
 The new and preexisting files differ in one or more attributes. This error can be overridden by calling VerInstallFile again with the VIFF_FORCEINSTALL flag set.
VIF_OUTOFMEMORY
0x00008000L
 The function cannot complete the requested operation due to insufficient memory. Generally, this means the application ran out of memory attempting to expand a compressed file.
VIF_OUTOFSPACE
0x00000100L
 The function cannot create the temporary file due to insufficient disk space on the destination drive.
VIF_SHARINGVIOLATION
0x00000400L
 A read, create, delete, or rename operation failed due to a sharing violation.
VIF_SRCOLD
0x00000004L
 The file to install is older than the preexisting file. This error can be overridden by calling VerInstallFile again with the VIFF_FORCEINSTALL flag set.
VIF_TEMPFILE
0x00000001L
 The temporary copy of the new file is in the destination directory. The cause of failure is reflected in other flags.
VIF_WRITEPROT
0x00000040L
 The preexisting file is write-protected. This error can be overridden by calling VerInstallFile again with the VIFF_FORCEINSTALL flag set.

Remarks

This function works on 16-, 32-, and 64-bit file images.

VerInstallFile copies the file from the source directory to the destination directory. If szCurDir indicates that a previous version of the file exists on the system, VerInstallFile compares the files' version stamp information. If the previously installed version of the file is more recent than the new version, or if the files' attributes are significantly different, for example, if they are in different languages, then VerInstallFile returns with one or more recoverable error codes.

VerInstallFile leaves the temporary file in the destination directory. The application can either override the error or delete the temporary file. If the application overrides the error, VerInstallFile deletes the previously installed version and renames the temporary file with the original filename.

Note

The winver.h header defines VerInstallFile 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.

Requirements

Requirement Value
Minimum supported client Windows 2000 Professional [desktop apps only]
Minimum supported server Windows 2000 Server [desktop apps only]
Target Platform Windows
Header winver.h (include Windows.h)
Library Version.lib
DLL Api-ms-win-core-version-l1-1-0.dll

See also

Conceptual

Reference

VerFindFile

Version Information