DIZipWriter is a high performance zipping component with strong AES encryption for Borland Delphi. It creates standard ZIP archives as well as high-security archives with up to 256-bit key size introduced by WinZip 9. There is no other known Delphi component supporting this level of ZIP encryption.

Another unique feature of DIZipWriter is its TStream based interface, which allows to:

• Create ZIP archives as streams, including files, memory streams, BLOB streams, etc.
• Create entire ZIP archives in memory or write them directly to database BLOBs.
• Add ZIP entries from streams using the CopyFrom procedure.
• Directly stream objects to ZIP archives using the SaveToStream procedure.

In addition to streams, DIZipWriter also works with

• files, including long file names and relative paths
• strings
• memory buffers and records.

For optimal performance, DIZipWriter writes all data straight to the ZIP archive and uses no temporary files. Its footprint and memory requirements and are very small. Includes HTML help and example projects.

• Standard support for Delphi 6, 7, 8, 2005, Kylix 3 and C++ 6 (Delphi 1-5, C++ Builder 1-5 and Kylix 1-2 no longer officially supported)
• Create and manage multi-file compressed archives
• Files and archives up to 8 exabytes supported (Note: memory streams and descendants are still limited to 2GB in size)
• Simple one-step methods for most operations, including backup/restore
• Create segmented (multi-disk) archives with the TSegLHA component
• Read/write archives made with LHArc and LHA (also shell utilities like WinZip)
• Read compatible with TCompress archives
• Compress any stream (e.g. memory, database blobs) directly to/from archives
• Standard user interface provided, fully customizable
• Encryption, wild card and self-extracting EXEs all supported
• Built-in verify and "safe" modes -- ideal for Internet and communication applications
• Thread-safe, NATIVE compression -- no DLL or OCX worries
• Full component source code available
• Registration $US79 (new users) $NZ59 (registered users)
• Download your upgrade or free evaluation copy from http://www.spis.co.nz/complha.htm

• Standard support for Delphi 6, 7, 8, 2005, Kylix 3 and C++ Builder 6 (Delphi 1-5, C++ Builder 1-5 and Kylix 1-2 no longer officially supported)
• Thread-safe NATIVE compression -- no DLL, OCX worries
• Multi-file compressed archives using the TCompress component
• Files and archives up to 8 exabytes are supported (Note: memory streams and their descendants are still limited to 2 GBytes in size)
• Database BLOB (memo, image) compression with TCDBMemo, TCDBimage and TCDBRichText
• In-memory compression using streams (file/memory/blob/resource<-- >file/memory/blob)
• Event hooks for customizable user interaction
• Built-in LZH5 (Lempel-Ziv-Huffman) and RLE (Run-Length Encoding) compression
• Easy to add your own custom compression routines at any time
• Functions and examples to support compressed resources and self- extracting EXEs
• CompressString and ExpandString utility methods
• Key-based compressed data encryption
• Loads of example source included
• Full component source code available
• Registration $US79 (new users) $NZ59 (registered users)
• Download your upgrade or free evaluation copy from http://www.spis.co.nz/compress.htm