The Xceed Zip control handles all zip, unzip and file to memory / memory to file tasks other than compression directly from one memory block to another. Memory-only compression is done through the Xceed Compression control. Both of these controls are part of the same component (XCEEDZIP.DLL), and can be accessed by either the ActiveX interface, or by direct DLL API calls.

The Xceed Zip control is a very flexible compression and decompression component that is fully compatible with the latest zip file format and can also read and write Zip files that use the advanced new BWT compression method and the Deflate64 ™ compression method, also known as Enhanced Deflate,which is, for the moment,  supported by PKZIP v4.5 and up only.

 When using Xceed Zip's default Deflate compression method, regular and multi-disk zip files created by Xceed Zip can be used by PKZIP 2.04g and PKZIP 4.5 as well as WinZip and vice-versa. Xceed Zip does not unzip files from zip files created with old versions of PKZIP before PKZIP 2.0 - those files use very outdated compression methods that are not supported.

Xceed Zip provides a large number of properties, methods and events allowing full-featured manipulation of zip files, real-time progress reports and easy integration with a graphical user interface.

ProgID

XceedSoftware.XceedZip.6 

Getting started quickly Zipping files Unzipping files Listing the contents of a zip file Creating or unzipping a spanned zip file Adding a progress bar Creating a new self-extracting zip file Converting a zip file to self-extracting Zipping from memory to a zip file Unzipping from a zip file to memory Compression entirely in memory Other information Brief introduction to the zip file format Controlling how paths are stored in the zip file Formless use of the control Running multiple operations at the same time Support for 64-bit values

Resources Methods Properties Events Enumeration types Error codes Warnings Skipping reasons