import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.ole.win32.OLE;
import org.eclipse.swt.ole.win32.OleAutomation;
import org.eclipse.swt.ole.win32.OleControlSite;
import org.eclipse.swt.ole.win32.OleEvent;
import org.eclipse.swt.ole.win32.OleFrame;
import org.eclipse.swt.ole.win32.OleListener;
import org.eclipse.swt.ole.win32.Variant;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class WordMain {

    final static int DocumentBeforeSaveEvent = 0x00000008;

    public static void main(String[] args) {
        Display display = new Display();

        Shell shell = new Shell(display);
        OleFrame frame = new OleFrame(shell, SWT.NONE);
        shell.setLayout(new GridLayout());
        frame.setLayoutData(new GridData(GridData.FILL_HORIZONTAL | GridData.FILL_VERTICAL));

        OleControlSite site = new OleControlSite(frame, SWT.NONE, "Word.Document");
        OleAutomation doc = new OleAutomation(site);
        int[] dispInfo = doc.getIDsOfNames(new String[] { "Application" });
        Variant variant = doc.getProperty(dispInfo[0]);
        OleAutomation app = variant.getAutomation();
        variant.dispose();

        OleListener listener = new OleListener() {

            @Override
            public void handleEvent(OleEvent event) {
                System.out.println("DocumentBeforeSave Event, no. params:" + event.arguments.length);
            }
        };

        site.addEventListener(app, DocumentBeforeSaveEvent, listener);

        site.doVerb(OLE.OLEIVERB_OPEN);
        shell.open();

        while (!shell.isDisposed()) {
            if (!display.readAndDispatch()) {
                display.sleep();
            }
        }

        app.dispose();

    }
}