An easy to use ActiveX/COM data compression library built for the x86-64 architecture. You name the feature, it does it. Zip, unzip, updating, converting, disk and memory streaming, AES encryption, no 4GB or file limit, various compression algorithms, filtering, split/spanned/self-extracting zip files, and much more.
The library is a fully self-contained DLL, written with ATL 3.0 and with no external dependencies, STA/MTA multi-threaded apartment models, Unicode file and I/O calls, and more. Use it as an ActiveX/COM control, or access it as a standard 64-bit DLL through its exported API.
Advanced capabilities include non-blocking methods for background operation, wildcards that work even for folder names, renaming files in a zip file without unzipping then rezipping, etc.