: The command-line tool 7z.exe acts as a client that calls 7z.dll to handle the actual archive creation and extraction. Key Features to Implement
: If you use LGPL code, your modifications to that specific DLL must remain open-source. FCL1.7z
To develop a new feature for the 7z format or 7-Zip software (often referred to by internal components like 7z.dll or 7z.exe ), you generally need to work with the or its open-source code. Getting Started with Development : The command-line tool 7z
What (C++, Python, C#) or feature type (new codec, GUI change, automation) are you planning to work on? Getting Started with Development What (C++, Python, C#)
: You can develop features to enhance how archive headers are compressed or encrypted, which protects file and folder names.
: This is the core toolkit provided by 7-Zip for developers to integrate 7z compression/decompression into their own apps.
: High compression ratios require large RAM blocks (often megabytes to gigabytes) to find duplicated data patterns.