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Quick Info
Windows NT
| Yes
| Win95
| Yes
| Win32s
| No
| Import Library
| imagehlp.lib
| Header File
| imagehlp.h
| Unicode
| No
| Platform Notes
| Windows 95: IMAGEHLP is available as a redistributable.
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MapFileAndCheckSumW
The MapFileAndCheckSumW function computes the checksum of an image file.
ULONG MapFileAndCheckSumW(
IN PWSTR Filename,
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| OUT LPDWORD HeaderSum,
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| OUT LPDWORD CheckSum
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| );
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Parameters
Filename
The filename of the file for which the checksum is to be computed.
HeaderSum
A pointer to a variable that receives the original checksum from the image
file, or zero if there is an error.
CheckSum
A pointer to the variable that receives the computed checksum.
Return Values
If the function succeeds, the return value is CHECKSUM_SUCCESS.
If the function fails, then the return value is one of the following:
Value
| Meaning
| CHECKSUM_OPEN_FAILURE
| Could not open the file.
| CHECKSUM_MAP_FAILURE
| Could not create the file mapping for the file.
| CHECKSUM_MAPVIEW_FAILURE
| Could not map a view of the file.
| CHECKSUM_UNICODE_FAILURE
| Could not convert the filename to UNICODE.
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Remarks
A new checksum for the file is computed and returned in the CheckSum parameter. This function is used by any application that creates or modifies
an executable image. Checksums are required for Windows NT kernel mode drivers
and some system DLLs. The Win32 linker computes the original checksum at link
time, if the linker switch for checksumming is turned on. It is recommended that
all images have valid checksums.
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