>I'm modifying the code in the Zip method here http://www.codeproject.com/KB/cs/unzipC_usingJ_.aspx
>
>This code creates the ZIP file:
>

FileOutputStream filOpStrm = new FileOutputStream(zipFileName);

>
>If the file already exists, I want to add to it. How do I get a reference to the
>file without recreating it?

FileOutputStream filOpStrm = new FileOutputStream(zipFileName,true)

But that looks like you'd be concatenating ZIP files and I don't think it will work.

HTH,Viv