Xceed Zip for ActiveX

Compression & Zip file technology

• Supports WinZip 9.0 (and up) compatible AES strong encryption.
• Fast, low memory usage compression engine.
• 100% compatible with the PKZIP 2.04g format.
• 100% compatible with the PKZIP 4.5 format.
• Supports the Zip64 zip file format allowing the creation of Zip files of practically unlimited size (no 4 GB limit).
• Supports the BZip2 (BWT) compression method for 15% to 20% better compression than Deflate on many popular file types, especially XML data.
• The only library to provide WinZip 12 compatibility, supporting the LZMA algorithm for improved compression in certain situations. Note: Zip files using WinZip 12’s special JPEG recompression feature are not supported.
• UTF-8 character encoding in headers for improved support of international characters in filenames and comments is provided.
• Supports the Deflate64TM compression method, an industry standard improvement to regular Deflate.
• Zip files can contain any number of files (no 65535 file limit).
• Regular, spanned, and self-extracting zip files created by Xceed Zip can be used by any of today’s existing unzipping applications, and vice-versa.
• Stores and retrieves the latest zip file format extensions, allowing Unicode filenames and NT file attributes, extra time stamps, and security permissions to be stored in the zip file.
• No need to repair corrupted zip files. Xceed Zip automatically tries to recover from errors and reports any inconsistencies found in the zip file while unzipping.

Major operations

• Zip files or memory buffers into new or existing zip files.
• Unzip files to disk or directly to memory.
• Compress and decompress strings or buffers completely in memory.
• All compression and decompression modes support streaming and encryption.
• Create fully customizable self-extracting zip files.
• Convert any type of zip file (regular, spanned, multi-part, self-extracting, or spanned self-extracting) into any other type of zip file.
• Reads and writes zip files that span multiple disks.
• Reads and writes multi-part zip files directly to hard drive.
• Update one zip file from another one’s contents or merge two zip files together.
• Optional background processing so your code can continue execution while Xceed Zip is working.