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   源码介绍

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using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using System.Windows.Forms;
using System.Windows;

namespace 虚拟桌面
{
    public class VirtualDesktopHelper : IDisposable
    {
        #region 字段

        private const int winCount = 9;
        private List<IntPtr>[] winGroup = new List<IntPtr>[winCount];//窗体组
        private int currentID = 0;//当前虚拟桌面ID
        private delegate bool CallBack(IntPtr hwnd, int lParam);

        #endregion

        public int CurrentID
        {
            get { return this.currentID; }
        }

        #region 属性

        private IntPtr selfHWND;
        public IntPtr SelfHWND
        {
            get { return this.selfHWND; }
        }

        private static int hotKeyID = 80000;
        public static int HotKeyID
        {
            get { return hotKeyID; }
        }

        #endregion

        public VirtualDesktopHelper(Form hostForm)
        {
            this.selfHWND = hostForm.Handle;
            //初始化窗体组
            for (int index = 0; index < winGroup.Length;   index)
            {
                winGroup[index] = new List<IntPtr>();
            }
        }
        
        public void RegisterHotKey(ModifyKeys modifyKey)// 注册系统热键
        {
            int id = hotKeyID;
            API.RegisterHotKey(selfHWND, id  , (uint)modifyKey, Keys.D1);
            API.RegisterHotKey(selfHWND, id  , (uint)modifyKey, Keys.D2);
            API.RegisterHotKey(selfHWND, id  , (uint)modifyKey, Keys.D3);
            API.RegisterHotKey(selfHWND, id  , (uint)modifyKey, Keys.D4);
            API.RegisterHotKey(selfHWND, id  , (uint)modifyKey, Keys.D5);
            API.RegisterHotKey(selfHWND, id  , (uint)modifyKey, Keys.D6);
            API.RegisterHotKey(selfHWND, id  , (uint)modifyKey, Keys.D7);
            API.RegisterHotKey(selfHWND, id  , (uint)modifyKey, Keys.D8);
            API.RegisterHotKey(selfHWND, id  , (uint)modifyKey, Keys.D9);
            API.RegisterHotKey(selfHWND, hotKeyID - 1, (uint)ModifyKeys.Alt, Keys.Oemtilde);
        }
       
        public void UnRegisterHotKey()// 缷载系统热键
        {
            int id = hotKeyID;
            for (int i = 0; i < winCount;   i)
            {
                API.UnregisterHotKey(selfHWND, id   i);
            }
            API.UnregisterHotKey(selfHWND, hotKeyID - 1);
        }

        public void Dispose()
        {
            for (int index = 0; index < winGroup.Length;   index)
            {
                foreach (IntPtr hwnd in winGroup[index])
                {
                    if (API.IsWindowVisible(hwnd) == 0)
                    {
                        API.ShowWindow(hwnd, (int)WindowAction.ShowNoActivate);
                    }
                }
            }
        }

        private static class API
        {
            #region Import API

            /// <summary>
            /// 注册热键
            [DllImport("user32")]
            public static extern bool RegisterHotKey(IntPtr hWnd, int id, uint control, Keys vk);

            /// <summary>
            /// 缷载热键
            [DllImport("user32")]
            public static extern bool UnregisterHotKey(IntPtr hWnd, int id);


            [DllImport("user32")]
            public static extern int IsWindowVisible(IntPtr hWnd);

            [DllImport("user32")]
            public static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);

            #endregion
        }

        private enum WindowAction
        {
            Hide = 0x00,
            Show = 0x04,
            Restore = 0x03,
            ShowNoActivate = 0x08
        }

        [Flags]
        public enum ModifyKeys
        {
            None = 0x00,
            Alt = 0x01,
            Ctrl = 0x02,
            Shift = 0x04,
            Windows = 0x08
        }

    }
}