File Compression

[Ramandeep]

Can any one show me how to create file compression, the principle behind it and if possible give a small sample, or advise me on a particular book.

Thanks in advance!!!

http://www.vbaccelerator.com/ has a great example of how to use the engine that Winzip uses. The site owner has developed some WAY cool samples and made a COM friendly wrapper to the original C-Style DLL(i.e. not a COM dll--Needs a Declare...) used for the compression engine. I believe there is some VERY minor license issues. Basically so long as you're keeping the stuff in house and not making money off of a retail product that uses their engine, everything is cool. I have also seen code for the LZH algorithm floating around but I tested one sample app and it wasn't worth the time and effort, the vbaccelerator example was much better.

-chris