Hi, In the java.utils.zip include tools that should help JAVA developers in .NET But, one of the grate features there, that i can't understand why it isn't part of the common BCL is the zip file support. First, add vjslib.dll and vjslibcw.dll as reference. If you can't find them, ther are in J# Package: Here[^]. Use ZipFile Class to zip and unzip files.