用C#实现智能设备上的NotifyIcon类

[DllImport("coredll.dll")]
internal static extern int Shell_NotifyIcon(int dwMessage, ref  NOTIFYICONDATA pnid);

其中，NOTIFYICONDATA结构如下：

struct NOTIFYICONDATA
{
    int cbSize;
    IntPtr hWnd;
    uint uID;
    uint uFlags;
    uint uCallbackMessage;
    IntPtr hIcon;
}
     Pnid参数的生命需要注意，是按引用传递的，因为Shell_NotifyIcon 需要一个指向 NOTIFYICONDATA 结构的指针。
    hWnd是用来接收任务栏中图标单击消息的窗口的句柄。
运行示例的时候由于窗体最大化，挡住了任务栏，把窗体最小化之后就能看到托盘图标了。（效果图片竟然贴不上来，改天再贴吧）
该类和示例的下载地址：http://www.cnblogs.com/Files/ttinfo/NotifyIconCf.rar

下面是NotifyIcon类的实现，别忘了引用Microsoft.WindowsCE.Forms。注意Add方法提供了不同的重载形式，具体请参看注释：

using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;

namespace NotifyClient
{
    /**//// <summary>
    /// 智能设备托盘图标类
    /// </summary>
    public class NotifyIcon
    {
        //单击事件
        public event System.EventHandler Click;

        private MyMessageWindow messageWindow;
        private int uID = 5000;
        private System.Drawing.Icon _Icon;
       
        public NotifyIcon()
        {
            messageWindow = new MyMessageWindow(this);
            messageWindow.uID = uID;
        }
        public System.Drawing.Icon Icon
        {
            set
            {
                _Icon = value;

            }
        }
     
        ~NotifyIcon()
        {
            Remove();
        }

        /**//// <summary>
        /// 添加托盘图标
        /// </summary>
        /// <param name="hIcon">icon文件的有效句柄</param>
        public void Add(IntPtr hIcon)
        {
            NotifyMessage(messageWindow.Hwnd, NIM_ADD, (uint)uID, hIcon);
        }
        /**//// <summary>
        /// 添加托盘图标
        /// </summary>
        /// <param name="IconRes">编译之后的资源文件中的icon资源名称，如“#201547”</param>
        public void Add(string IconRes)
        {
            IntPtr hIcon = LoadIcon(GetModuleHandle(null), IconRes);
            NotifyMessage(messageWindow.Hwnd, NIM_ADD, (uint)uID, hIcon);
        }
        /**//// <summary>
        /// 添加托盘图标
        /// </summary>
        /// <param name="icon">icon文件</param>
        public void Add(System.Drawing.Icon icon)
        {
            NotifyMessage(messageWindow.Hwnd, NIM_ADD, (uint)uID, icon.Handle);
        }
        /**//// <summary>
        /// 添加托盘图标；icon为属性中的icon
        /// </summary>
        public void Add()
        {
            if (_Icon != null)
            {
                NotifyMessage(messageWindow.Hwnd, NIM_ADD, (uint)uID, _Icon.Handle);
            }
        }
        public void Remove()
        {

            NotifyMessage(messageWindow.Hwnd, NIM_DELETE, (uint)uID, IntPtr.Zero);
        }

        public void Modify(IntPtr hIcon)
        {

            NotifyMessage(messageWindow.Hwnd, NIM_MODIFY, (uint)uID, hIcon);

        }

        private void NotifyMessage(IntPtr hwnd, int dwMessage, uint uID, IntPtr hIcon)
        {
            NOTIFYICONDATA notdata = new NOTIFYICONDATA();

            notdata.cbSize = 152;
            notdata.hIcon = hIcon;
            notdata.hWnd = hwnd;
            notdata.uCallbackMessage = WM_NOTIFY_TRAY;
            notdata.uFlags = NIF_MESSAGE | NIF_ICON;
            notdata.uID = uID;

            int ret = Shell_NotifyIcon(dwMessage, ref notdata);
        }

        API#region API
        //定义消息常量
        const int NIF_MESSAGE = 0x00000001;
        const int NIF_ICON = 0x00000002;
        internal const int WM_LBUTTONDOWN = 0x0201;   

        internal const int NIM_ADD = 0x00000000;
        internal const int NIM_MODIFY = 0x00000001;
        internal const int NIM_DELETE = 0x00000002;

        //自定义消息
        internal const int WM_NOTIFY_TRAY = 0x0400 + 2001;

        internal struct NOTIFYICONDATA
        {
            internal int cbSize;
            internal IntPtr hWnd;
            internal uint uID;
            internal uint uFlags;
            internal uint uCallbackMessage;
            internal IntPtr hIcon;           
        }

        [DllImport("coredll.dll")]
        internal static extern int Shell_NotifyIcon(
            int dwMessage, ref NOTIFYICONDATA pnid);

        [DllImport("coredll.dll")]
        internal static extern int SetForegroundWindow(IntPtr hWnd);

        [DllImport("coredll.dll")]
        internal static extern int ShowWindow(
            IntPtr hWnd,
            int nCmdShow);

        [DllImport("coredll.dll")]
        internal static extern IntPtr GetFocus();

        [DllImport("coredll.dll")]
        internal static extern IntPtr LoadIcon(IntPtr hInst, string IconName);

        [DllImport("coredll.dll")]
        internal static extern IntPtr GetModuleHandle(String lpModuleName);

        #endregion

        MessageWindow#region MessageWindow

        internal class MyMessageWindow : Microsoft.WindowsCE.Forms.MessageWindow
        {
           
            private int _uID = 0;
            private NotifyIcon notifyIcon;

          
            public MyMessageWindow(NotifyIcon notIcon)
            {
                notifyIcon = notIcon;
            }

            public int uID
            {
                set
                {
                    _uID = value;

                }
            }

            protected override void WndProc(ref Microsoft.WindowsCE.Forms.Message msg)
            {

                if (msg.Msg == WM_NOTIFY_TRAY)
                {
                    if ((int)msg.LParam == WM_LBUTTONDOWN)
                    {
                        if ((int)msg.WParam == _uID)
                        {
                           
                            if (notifyIcon.Click != null)
                                notifyIcon.Click(notifyIcon, null);

                        }
                    }
                }

            }
        }
        #endregion

    }
}