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public static void sendEMail() {
    Display display = Display.getCurrent();
    Shell shell = new Shell(display);
    OleFrame frame = new OleFrame(shell, SWT.NONE);
    // This should start outlook if it is not running yet
    OleClientSite site = new OleClientSite(frame, SWT.NONE, "OVCtl.OVCtl");
    site.doVerb(OLE.OLEIVERB_INPLACEACTIVATE);
    // now get the outlook application
    OleClientSite site2 = new OleClientSite(frame, SWT.NONE, "Outlook.Application");
    OleAutomation outlook = new OleAutomation(site2);
    //
    OleAutomation mail = invoke(outlook, "CreateItem", 0 /* Mail item */).getAutomation();
    setProperty(mail, "To", "test@gmail.com"); /*
                                                * Empty but could also be predefined
                                                */
    setProperty(mail, "Bcc", "test@gmail.com"); /*
                                                 * Empty but could also be predefined
                                                 */
    setProperty(mail, "BodyFormat", 2 /* HTML */);
    setProperty(mail, "Subject", "Top News for you");
    setProperty(mail, "HtmlBody", "<html>Hello<p>, please find some infos here.</html>");
    File file = new File("c:/temp/test.txt");
    if (file.exists()) {
      OleAutomation attachments = getProperty(mail, "Attachments");
      invoke(attachments, "Add", "c:/temp/test.txt");
    }
    else {
      MessageDialog.openInformation(shell, "Info",
          "Attachment File c:/temp/test.txt not found; will send email with attachment");
    }
    invoke(mail, "Display" /* or "Send" */);

  }

  private static OleAutomation getProperty(final OleAutomation auto, final String name) {
    Variant varResult = auto.getProperty(property(auto, name));
    if ((varResult != null) && (varResult.getType() != OLE.VT_EMPTY)) {
      OleAutomation result = varResult.getAutomation();
      varResult.dispose();
      return result;
    }
    return null;
  }

  private static Variant invoke(final OleAutomation auto, final String command, final String value) {
    return auto.invoke(property(auto, command), new Variant[] { new Variant(value) });
  }

  private static Variant invoke(final OleAutomation auto, final String command) {
    return auto.invoke(property(auto, command));
  }

  private static Variant invoke(final OleAutomation auto, final String command, final int value) {
    return auto.invoke(property(auto, command), new Variant[] { new Variant(value) });
  }

  private static boolean setProperty(final OleAutomation auto, final String name, final String value) {
    return auto.setProperty(property(auto, name), new Variant(value));
  }

  private static boolean setProperty(final OleAutomation auto, final String name, final int value) {
    return auto.setProperty(property(auto, name), new Variant(value));
  }

  private static int property(final OleAutomation auto, final String name) {
    return auto.getIDsOfNames(new String[] { name })[0];
  }