The addZIP Compression Components are the simplest way to add the industry-standard PKZIP compatible file compression and decompression to your programs. These royalty-free, multithreaded ActiveX/COM components are compatible with all 32-bit development software including Visual Basic 6/.NET, C/C++, Delphi and Visual FoxPro. The addZIP and addUNZIP components have no user-interface so they can be used both in desktop and server applications.