by Aaron Ballman
RARLab has been kind enough to release a freeware decompression library for its proprietary RAR format. If you're interested in supporting this format in your own applications, I've created an UnRAR project which implements their API.
To download the UnRAR SDK from RARLab, click here. For the REALbasic example project, click here. Note that this project (and SDK) are Win32-only, however, RARLab does include the source code for the UnRAR project. If you create a shared library for another platform which REALbasic supports and wish to have your library included with this download, please contact me.