The URARFileLib is a small library that allows you to read files from RAR archives created with RAR and WinRAR. Decompression and decryption with full RAR v2.0 compatibility is done directly in your application, thus there is no need for a DLL or any other external file. This file library is based on the free unRAR source code by Eugene Roshal, and designed for easy but powerful usage in demos and intros. This library is also useful if you want to port your demos since the URARFileLib supports multiple operating systems (Linux, SunOS, and Win32).

Update: As of June, 2002, The library is hosted at a new URL, has a new dual license, and improved samples for Win32, Linux, and UNIX.

http://www.unrarlib.org/