[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： 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); } #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 #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 }}