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7-Zip 4.65 Sources


7-Zip is a file archiver for Windows 95/98/ME/NT/2000/2003/XP/Vista. 

7-Zip Copyright (C) 1999-2009 Igor Pavlov.

License Info


7-Zip is free software distributed under the GNU LGPL 

(except for unRar code).

read License.txt for more infomation about license.

Notes about unRAR license:

Please check main restriction from unRar license:

   2. The unRAR sources may be used in any software to handle RAR

      archives without limitations free of charge, but cannot be used

      to re-create the RAR compression algorithm, which is proprietary.

      Distribution of modified unRAR sources in separate form or as a

      part of other software is permitted, provided that it is clearly

      stated in the documentation and source comments that the code may

      not be used to develop a RAR (WinRAR) compatible archiver.

In brief it means:

1) You can compile and use compiled files under GNU LGPL rules, since 

   unRAR license almost has no restrictions for compiled files.

   You can link these compiled files to LGPL programs.

2) You can fix bugs in source code and use compiled fixed version.

3) You can not use unRAR sources to re-create the RAR compression algorithm.



Also this package contains files from LZMA SDK

you can download LZMA SDK from this page:


read about addtional licenses for LZMA SDK in file


How to compile


To compile sources you need Visual C++ 6.0.

For compiling some files you also need 

new Platform SDK from Microsoft' Site:






If you use MSVC6, specify SDK directories at top of directories lists:

Tools / Options / Directories

  - Include files

  - Library files

To compile 7-Zip for AMD64 and IA64 you need:

  Windows Server 2003 SP1 Platform SDK from microsoft.com

Also you need Microsoft Macro Assembler:

  - ml.exe for x86 

  - ml64.exe for AMD64

You can use ml.exe from Windows SDK for Windows Vista or some other version.

Compiling under Unix/Linux


Check this site for Posix/Linux version:




7-Zip consists of COM modules (DLL files).

But 7-Zip doesn't use standard COM interfaces for creating objects.

Look at

7zip\UI\Client7z folder for example of using DLL files of 7-Zip. 

Some DLL files can use other DLL files from 7-Zip.

If you don't like it, you must use standalone version of DLL.

To compile standalone version of DLL you must include all used parts

to project and define some defs. 

For example, 7zip\Bundles\Format7z is a standalone version  of 7z.dll 

that works with 7z format. So you can use such DLL in your project 

without additional DLL files.

Description of 7-Zip sources package


DOC                Documentation


  7zFormat.txt   - 7z format description

  copying.txt    - GNU LGPL license

  unRarLicense.txt - License for unRAR part of source code

  history.txt    - Sources history

  Methods.txt    - Compression method IDs

  readme.txt     - Readme file

  lzma.txt       - LZMA SDK description

  7zip.nsi       - installer script for NSIS

C   - Source code in C

CPP - Source code in CPP

Common            Common modules

Windows           Win32 wrappers



  Common          Common modules for 7-zip

  Archive         7-Zip Archive Format Plugins 














  Bundle          Modules that are bundles of other modules


    Alone         7za.exe: Standalone version of 7z

    Alone7z       7zr.exe: Standalone version of 7z that supports only 7z/LZMA/BCJ/BCJ2

    SFXCon        7zCon.sfx: Console 7z SFX module

    SFXWin        7z.sfx: Windows 7z SFX module

    SFXSetup      7zS.sfx: Windows 7z SFX module for Installers

    Format7z            7za.dll:  .7z support

    Format7zExtract     7zxa.dll: .7z support, extracting only

    Format7zR           7zr.dll:  .7z support, LZMA/BCJ* only

    Format7zExtractR    7zxr.dll: .7z support, LZMA/BCJ* only, extracting only

    Format7zF           7z.dll:   all formats



    Agent         Intermediary modules for FAR plugin and Explorer plugin

    Console       7z.exe Console version

    Explorer      Explorer plugin

    Resource      Resources

    Far           FAR plugin  

    Client7z      Test application for 7za.dll 



    BZip2        BZip2 compressor

    Branch       Branch converter

    ByteSwap     Byte Swap converter

    Copy         Copy coder





    PPMd          Dmitry Shkarin's PPMdH with small changes.

    LZ            Lempel - Ziv

  Crypto          Crypto modules


    7zAES         Cipher for 7z

    AES           AES Cipher

    Rar20         Cipher for Rar 2.0

    RarAES        Cipher for Rar 3.0

    Zip           Cipher for Zip

  FileManager       File Manager


Igor Pavlov