PKWARE DLL

Experts,
I'm using the pkware programming libraries to perform data compression of text/image data base columns.

To read the data:
I read the image column, write a file and explode the file, then i have the uncompressed data (*.pcx). The problem
is that some of the uncompressed files
are invalid (in these files the explode and inplode operation modify the file size!).

I think the problem are: the pointers,
some data type incompatible with the pkware libraries.

Please i need some C/C++ source code that invokes the pkware libraries without any problem, or some recomendation to use this library correctly,

Thanks