API -> DecryptFile [ Library : advapi32.dll, Category : File Management ] [C#, VB, VB.net]

DecryptFile

Library : advapi32.dll Category : File Management

Api Example(s)
Taking advantage of EFS (Encrypted File System) APIs in Win2K/XP
Encrypt/Decrypt file using Microsoft Crypto APIs (With User specific crypto key option)

API Description :

The DecryptFile function decrypts an encrypted file or directory.

VB Declaration :

Show Multiline Public Private

Declare Function DecryptFile Lib "ADVAPI32" Alias "DecryptFileA" (ByVal lpFileName As String, ByVal dwReserved As Long) As Boolean

Parameters :

· lpFileName
[in] Pointer to a null-terminated Unicode string that specifies the name of the file to decrypt.
The caller must have FILE_READ_DATA, FILE_WRITE_DATA, FILE_READ_ATTRIBUTES, FILE_WRITE_ATTRIBUTES, and SYNCHRONIZE access to the file.

· dwR

Return :

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.

OS Requirement :

Requires Windows 2000 or later
Win9x/ME: Not supported

Dotnet Replacement :

System.Security.Cryptography.CryptoStream.Read