This code in C#, zips all the files in a directory. It requires DotNetZip (http://dotnetzip.codeplex.com )

using (ZipFile zip = new ZipFile())
{
zip.AddDirectory(@"MyDocuments∖ProjectX", "ProjectX");
zip.Comment = "This zip was created at " + System.DateTime.Now.ToString("G") ;
zip.Save(zipFileToCreate);
}