This high-performance Zip and Unzip data compression library lets your applications create and manipulate 100% PKZip 2.04g and 4.5 compatible Zip files as well as compress/uncompress data directly in memory. It's designed to offer maximum flexibility while being the easiest to use product of its kind. Includes a state-of-the-art, impeccably documented ActiveX component that provides the industry's most complete feature set and the fastest multi-threaded compression engine.