EncryptFile The EncryptFile function encrypts a file or directory. All data streams in a file are encrypted. All new files created in an encrypted directory are encrypted.BOOL EncryptFile( LPCTSTR lpFileName // file name ); Parameters lpFileName [in] Pointer to a null-terminated string that specifies the name of the file or directory to encrypt. The caller must have FILE_READ_DATA, FILE_WRITE_DATA, FILE_READ_ATTRIBUTES, FILE_WRITE_ATTRIBUTES, and SYNCHRONIZE 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. Res The EncryptFile function requires exclusive access to the file being encrypted, and will fail if another process is using the file. If the file is already encrypted, EncryptFile simply returns a nonzero value, which indicates success. If the file is compressed, EncryptFile will decompress the file before encrypting it. To decrypt an encrypted file, use the DecryptFile function. Requirements Windows NT/2000: Requires Windows 2000 or later. Windows 95/98: Unsupported. Header: Declared in Winbase.h; include Windows.h. Library: Use Kernel32.lib. Unicode: Implemented as Unicode and ANSI versions on Windows 2000.
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The EncryptFile function encrypts a file or directory.
All data streams in a file are encrypted. All new files
created in an encrypted directory are encrypted.BOOL EncryptFile(
LPCTSTR lpFileName // file name
);
Parameters
lpFileName
[in] Pointer to a null-terminated string that specifies
the name of the file or directory to encrypt.
The caller must have FILE_READ_DATA, FILE_WRITE_DATA,
FILE_READ_ATTRIBUTES, FILE_WRITE_ATTRIBUTES, and
SYNCHRONIZE 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. Res
The EncryptFile function requires exclusive access to
the file being encrypted, and will fail if another
process is using the file. If the file is already encrypted, EncryptFile simply
returns a nonzero value, which indicates success. If
the file is compressed, EncryptFile will decompress
the file before encrypting it. To decrypt an encrypted file, use the DecryptFile
function. Requirements
Windows NT/2000: Requires Windows 2000 or later.
Windows 95/98: Unsupported.
Header: Declared in Winbase.h; include Windows.h.
Library: Use Kernel32.lib.
Unicode: Implemented as Unicode and ANSI versions on
Windows 2000.