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RSP Zip Compressor DLL 0.0.1 build 0005

Release date(Thu Oct 01 13:13:33 2009)

zip dll

Win32 DLL to compress , uncompress , delete , test and list standard zip files , support to the new format Zip64 ( extraction )


2009-10-01  Arab  <>
* 0.0.1 build 0005 Zip file comments support
now implemented
2009-10-01  Arab  <>
* 0.0.1 build 0004 - Added ability to extract
Zip64 zip files, two modes of unzip work
available , mode Unzip 5.5 or Unzip 6.0,
pause, resume and cancel not implemented
yet when using mode 6.0, ability to see
zip file comments not implemented yet

 2009-09-30  Arab  <>
 * 0.0.1 build 0003 - Added all the required
 function to zip, unzip, list and test
 standard zip files, support to extended zip
 files ( modifications PKware and Winzip
 did to the zip format after 1997 ) are
 already being added to the build 0004
 to be released in a few days
2009-09-29  Arab  <>
 * Whole source code included, minor modifications,
Unzip methods not available yet in this release
2009-09-28  Arab  <>
 * is missing unzip
methods, will be added tomorrow in release 0.0.2

Release 0.0.1 build 0002 (Fri Sep 25 08:37:34 2009)
Whole source code included, minor modifications,
Unzip methods not available yet in this release

What is new (Thu Sep 10 17:08:26 2009) Small internal update

What is new (16/Nov/2004 12:00) Fixed a bug that will not allow the compression of a unique file in the selection , in this case the control will return a 'nothing to do error' , to reproduce the problem just select a file that is available in the folder with the files to compress and select it to compress , as you will see the control will not compress the file , only selections that has a wildcard on the selection will work , fixed in this version , now you can compress single files without problem , minor bugs fixed also

What is new (09/Feb/2004 15:41) Added CPU detection code , added cpu priority selection code , enhanced the compression and decompression engine , the version 1.3.0 can compress files 10 to 15 percent faster than version 1.0.0 , fixed some xml parser error codes that may return wrong information , added more error verifications , fixed minor bugs

The upgrade is free to licensed users for two years


The RSP Zip Compress DLL can handle zip files with or without passwords , created with pkware or Info-zip based compressors

The compressor and decompressor is based on Info-zip

Due to some known Info-Zip limitations the control has several workarounds to avoid problems , and a page with the list of workarounds or known Info-Zip bugs is available in the RSP Info-Zip Known Bugs

The code receive information about the zip file , destination directory , password , arguments and options regarding compression or decompression using an xml like parser that can accept several commands

The list of commands and description of use is available in the page RSP Zip Compressor Commands

With the parser it is more easy to detect errors in the information passed to the compressor or decompressor and the commands are intuitive

It will avoid ambiguities on the compression or decompression code , since the parser will evaluate each command and return an error code if the command isnot accepted

And it will inform about missing commands or modifications required in the commands in order to work

With the parser it will be more easy to compress or decompress zip files since you only need to know about the commands and all the commands are intuitive making it a good solution to use zip compression in any application using only a few lines of code , and with full zip compression error handling

For each error , a description of the error will return , with the description it is very easy to understand what goes wrong , and how to avoid the same error in the future

The goal of this software is to provide as a development tool a DLL capable of generating a full zip utility running very fast in order to make it possible to anyone interested in zip compression to use it without possible bugs .

The sample project available with the package will show how to construct the commands and how to use the zip , unzip and list zip functions

We are open to discussion about a better way to receive information about the compression or decompression

If you have a better way to pass information to the control regarding the compression or decompression  , send email to  

And inform about bugs in the control as soon as possible , with the information we can track and fix the possible problems quickly


Documentation will be available soon

The documentation about the commands and how to use it is available in the
RSP Zip Compressor Commands

The information about bugs and limitations of the Info-Zip compression is available in the
RSP Info-Zip Known Bugs



- Extract the files to an empty folder and open the C# project

Operating System Compliance

Windows 95 , Windows 98 , Windows Millenium , Windows NT 4.0(sp6a) , Windows 2000 , Windows XP


RSP Zip Compress DLL 0.0.1 build 0005

 RSP Zip Compress DLL 0.0.1 build 0002

 RSP Zip Compress DLL 0.0.1


The registration grants to you free upgrades for two years

This DLL is available to register at PayPal

This DLL is available to register at Shareit!

After the registration the licensed version will be emailed to you , thanks for considering the registration

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