Create a .zip, clearing the archive attribute of each file zipped (i.e. Incremental Backup).

How to create a .zip archive such that each file zipped will have it's archive file attribute cleared.

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Chilkat.Zip zip = new Chilkat.Zip();

bool success;

//  Any string unlocks the component for the 1st 30-days.
success = zip.UnlockComponent("Anything for 30-day trial");
if (success != true) {
    MessageBox.Show(zip.LastErrorText);
    return;
}

success = zip.NewZip("test.zip");
if (success != true) {
    MessageBox.Show(zip.LastErrorText);
    return;
}

//  Tell the component to clear each file's archive attribute
//  when zipping.
zip.ClearArchiveAttribute = true;

//  Append a directory tree.
//  Notice that the archiveOnly flag is set to true.  This
//  means that only files with the "File is ready for archiving" bit
//  set will be included.  (In Windows Explorer, right-click a file
//  and select Properties.  Then click the Advanced button.  You'll
//  see the "File is ready for archiving" checkbox.
//  This becomes automatically checked whenever a file is modified (or created).
//  The AppendFilesEx method will only add files ready for
//  archiving, and the WriteZipAndClose method will clear the
//  archive attribute for each file zipped.  The result is that
//  each time you run this program, only the modified files are zipped.
bool recurse;
recurse = true;
bool archiveOnly;
archiveOnly = true;
bool includeHidden;
includeHidden = true;
bool includeSystem;
includeSystem = true;
bool saveExtraPath;
saveExtraPath = false;
zip.AppendFilesEx("c:/temp/abc123/*",recurse,saveExtraPath,archiveOnly,includeHidden,includeSystem);

success = zip.WriteZipAndClose();
if (success != true) {
    MessageBox.Show(zip.LastErrorText);
    return;
}

MessageBox.Show("Zip Created!");