/* make new message object */
        Message msg = new MessageClass();
        ADODB.Stream stm = null;
        msg.MimeFormatted = true;

        /* take a html file and try to write an mht */
        String path = file.ToString();
        Console.WriteLine("{0}", path);
        msg.CreateMHTMLBody("file://" + Path.GetFullPath(path), CdoMHTMLFlags.cdoSuppressNone, "", "");
        path = path.Replace(".html", ".mht");
        stm = msg.GetStream();
        stm.SaveToFile(path, ADODB.SaveOptionsEnum.adSaveCreateOverWrite);
        msg = null;
        stm.Close();

convertdir
|-- foo.js
|-- bar.css
|-- htmldir
|    |-- plsconvert.html

<script src="../foo.js" type="text/javascript" /><script type="text/javascript">