The Chilkat Zip C++ class library can be used with Microsoft Visual C++ 7.0, and provides C++ classes for creating, managing, and unzipping Zip archives. It supports zip and unzip progress monitoring, in-memory zipping and unzipping, AES strong-encryption, Gzip, Unix .Z compression, and creating self-extractor EXE’s. The Chilkat Zip components draw on over 7 years of zip compression component development, and have an established user base of approximately 10,000 customers. Chilkat's licensing provides for free new-version upgrades, 1 year unlimited email and phone support, and royalty-free redistribution.