This high-performance Zip and Unzip data compression library lets your applications create and manipulate 100% PKZip-compatible Zip files as well as compress/uncompress data directly in memory. It's designed to offer the ultimate in flexibility while being the easiest to use product of its kind. It includes a state-of-the-art, fully documented ActiveX COM component that provides the industry's most complete feature set and the fastest multi-threaded compression engine. This ActiveX component supports both single-threaded (STA) and multi-threaded (MTA) apartment models and has very low memory requirements. It is perfectly suited for use in environments running multiple zip/unzip operations simultaneously, can run in the background and can be dynamically instantiated for formless use. Xceed Zip has always been known for being superbly designed and easy to use. The latest version continues this tradition, featuring WinZip 9.0-compatible AES encryption (Rijndael) for solid security. It offers categorized properties, built-in constants and enumerations, context-sensitive F1-help, optional parameters and built-in help strings. With Xceed Zip, applications receive detailed information about the current compression activity, have full control over each file's information as it is being zipped and unzipped and can be consulted by the library when choices need to be made. There are twenty intelligently thought-out events that the component can trigger, so your application is never in the dark and can manipulate the library in real-time. Xceed Zip is 100% compatible with the latest PKZip 4.5 zip file format in addition to the traditional 2.04g format and has wide acceptance on many other platforms as well. Files that are compressed using the latest Zip format can be extracted using any of today's popular unzipping applications. Xceed Zip includes comprehensive online documentation that is packed with examples, as well as complete sample applications.