zipping and unzipping directory

There is a custom built zip library here [login to view URL] Create two functions using this library. ZipFolder(CString folderpath, CString zipfile) UnzipFolder(CString folderpath, CString zipfile) Those functions have to zip and unzip all the files and sub folders into a single zip file. Those two functions should be symmetrical - by that I mean that calling ZipFolder ("c:\abc","c:\[login to view URL]"); and later calling UnzipFolder ("c:\abc","c:\[login to view URL]"); should produce the same structure as it was before zipping. Source code has to compile in VS 2008. No additional lib or dll files to be used. Use only the library supplied on the website mentioned above.