SetFilePointer
The SetFilePointer function moves the file pointer of an open file.
DWORD SetFilePointer(
HANDLE hFile, // handle of file
LONG lDistanceToMove, // number of bytes to move file pointer
PLONG lpDistanceToMoveHigh,
// pointer to high-order DWORD of
// distance to move
DWORD dwMoveMethod // how to move
);
SetEndOfFile
The SetEndOfFile function moves the end-of-file (EOF) position for the specified file to the current position of the file pointer.
BOOL SetEndOfFile(
HANDLE hFile // handle of file whose EOF is to be set
);
The SetEndOfFile function moves the end-of-file (EOF) position for the specified file to the current position of the file pointer.
BOOL SetEndOfFile(
HANDLE hFile // handle of file whose EOF is to be set
);
Parameters
hFile
Identifies the file to have its EOF position moved. The file handle must have been created with GENERIC_WRITE access to the file.
Return Values
If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero. To get extended error information, call GetLastError.
Remarks
This function can be used to truncate or extend a file. If the file is extended, the contents of the file between the old EOF position and the new position are not defined.
If you called CreateFileMapping to create a file-mapping object for hFile, you must first call UnmapViewOfFile to unmap all views and call CloseHandle to close the file-mapping object before you can call SetEndOfFile.
