I made an example VB.Net 2010 application to show how to zip and unzip files using the SharpZipLib.DLL. The application uses the library to zip and unzip a file. Source code can be found here: https://drive.google.com/file/d/0BxXnsiUlViylclFFVnEtbWgwMnc/view?usp=sharing (115 KB) A compiled executable can be found here: https://drive.google.com/file/d/0BxXnsiUlViylSldJdzY5bmJ2QVE/view?usp=sharing (95 KB) Information on the SharpZipLib.DLL can be found here: http://icsharpcode.github.io/SharpZipLib/