Java调用Windows API,支持Office

				package org.jawin.browser.gui;
				
				/**
				 * Title: Jawin Code Generation GUI
				 * Description: GUI for exploring type libraries and generating Java code
				 * Copyright: Copyright (c) 2003
				 * Company: Open Source Incentive
				 * @author Josh Passenger
				 * @version 1.0
				 */
				
				public class FrameManager
				{
					private static FrameManager instance = null;
					private TypeBrowserFrame rootFrame = null;
				
					private FrameManager()
					{
					}
				
					public static synchronized void initialize(TypeBrowserFrame newRootFrame)
					{
						instance = new FrameManager();
						instance.rootFrame = newRootFrame;
					}
				
					public static FrameManager getInstance()
					{
						if (instance == null)
						{
							throw new IllegalStateException("FrameManager.getInstance() FrameManager was not initialized");
						}
				
						return instance;
					}
				
					public TypeBrowserFrame getRootFrame()
					{
						return rootFrame;
					}
				}