The CPackage::GetFileInformation function returns information about the specified file in the package.

BOOL GetFileInformation(
	DWORD dwFilePlatform,		// file platform
	DWORD dwFileChecksum,		// file checksum
	LPCTSTR lpszFileName,		// file name
	LPPACKAGE_FILE_INFORMATION lpFileInfo		// file information
);

Parameters

dwFilePlatform

[in] Specifies the target platform for the file.

 

This may be one of the following values:

Value	Description
PACKAGE_FILE_PLATFORM_DEFAULT	Find the file which is targeted for the current platform.
PACKAGE_FILE_PLATFORM_WIN95	The file may be applied to a system running Windows 95.
PACKAGE_FILE_PLATFORM_WIN98	The file may be applied to a system running Windows 98 or  Windows 98 SE.
PACKAGE_FILE_PLATFORM_WINME	The file may be applied to a system running Windows ME.
PACKAGE_FILE_PLATFORM_WINNT40	The file may be applied to a system running Windows NT 4.0.
PACKAGE_FILE_PLATFORM_WIN2000	The file may be applied to a system running Windows 2000.
PACKAGE_FILE_PLATFORM_WINXP	The file may be applied to a system running Windows XP.
PACKAGE_FILE_PLATFORM_WIN2003	The files may be applied to a system running Windows Server 2003.

In addition to the above platform-specific values, there are predefined values which specify platform groups:

 

Value	Description
PACKAGE_FILE_PLATFORM_WIN32	The file may be applied to any 32-bit version of the Windows operating system.
PACKAGE_FILE_PLATFORM_WIN9X	The file may be applied to any system running Windows 95, Windows 98 or Windows ME. The file will not be applied on a system running Windows NT, Windows 2000 or Windows XP.
PACKAGE_FILE_PLATFORM_WINNT	The file may be applied to any system running Windows NT, Windows 2000 or Windows XP. The file will not be applied on a system running Windows 95, Windows 98 or Windows ME.
PACKAGE_FILE_PLATFORM_WINDOWS	The files may be applied to any system running any version of Microsoft Windows.

dwFileChecksum

[in] Specifies the 32-bit checksum for the file. If the package contains multiple file versions, this value is used to uniquely identify the file. This parameter is ignored if the PACKAGE_OPTION_MULTIPLE_VERSIONS package option has not been enabled or if the parameter value is zero.

 

lpszFileName

[in] A pointer to a null-terminated string which specifies the name of the file to return information on.

 

lpFileInfo

[in/out] A pointer to a PACKAGE_FILE_INFORMATION structure that will contain information about the file. Note that the cbStructure member must be initialized to the size of the structure that is being passed to the function.

Return Values

If the CPackage::GetFileInformation function succeeds, it will return a non-zero value.

If the function fails, it will return a value of zero. To get extended error information, call GetLastError.

Remarks

The CPackage::GetFileInformation is used to obtain information about the reference file at the time the package was created. This allows you to perform your own preliminary checks against a target file or display information about the package file to a user.

Requirements

Windows NT/2000/XP: Requires Windows NT 4.0 SP3 or later.
Windows 95/98: Requires Windows 95 or later.
Header: Include apatch.h.
Library: Use apatch32.lib.
Unicode: Implemented as Unicode and ANSI versions on Windows NT/2000/XP.

See Also

CPatchFile::GetInformation