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A few weeks ago  I posted about J2ME file compression in Cinterion TC65 and XT65 modems. I posted an example of how to compress files to subsequently make a GPRS connection and send less data too (it’s cheaper and faster).

The issue of unzipping files remained. I.e. if you compress a file with a GPRS modem and send it to a central server, at some point in this server, the file will have to be unzipped in order to process the data.

This can be done easily (in Windows) using a free FLL called zlibwapi.dll.

With this library, it’s easy to create a data decompression program. Here you have a very simple program made in VB6 which allows you to compress (in the same way as the modem) and decompress files. It’s a very simple program using the DLL that I spoke about.

I hope you found it useful.

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