NotifyIconChange.dll

using System;
using System.Collections;
using System.Text;
using System.Windows.Forms;
using System.Drawing;
using System.IO;
using Microsoft.VisualBasic;
using Microsoft.WindowsCE.Forms;
using System.Runtime.InteropServices;

namespace NotifyIconNS
{
    

    public class NotifyIcon : IDisposable
    {
        public event EventHandler Click;
        private object[] eventObject;


        public string IconText
        {
            get { return iconText; }
            set { iconText = value; }
        }

        private String iconText;


        private WS ws;
        private int uID = 5000;

        public NotifyIcon()
        {
            eventObject = new object[] { this, "Click" };

            ws = new WS(this);
            ws.uID = uID;
        }

        public double DLLVersion
        {
            get { return 1; }
        }


        public void Add(Icon ike)
        {
            IntPtr hIcon;
            hIcon = ike.Handle;


            TrayMessage(ws.Hwnd, NIM_ADD, (uint)uID, hIcon);
        }

        public void Remove()
        {

            TrayMessage(ws.Hwnd, NIM_DELETE, (uint)uID, IntPtr.Zero);
        }

        public void Modify(Icon ike2)
        {
            IntPtr hIcon;
            hIcon = ike2.Handle;
            TrayMessage(ws.Hwnd, NIM_MODIFY, (uint)uID, hIcon);

        }

        private void TrayMessage(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);
       }


        public void Dispose()
        {
           try
            {
                Click = null;
                Remove();
            }
            finally { }
        }


        internal const int WM_LBUTTONDOWN = 0x0201;
        internal const int WM_NOTIFY_TRAY = 0x0400 + 2001;

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

        const int NIF_MESSAGE = 0x00000001;
        const int NIF_ICON = 0x00000002;


        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);


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

            protected internal WS(NotifyIcon notIcon)
            {
               notifyIcon = notIcon;
            }

            public int uID
            {
                set
                {
                    m_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 == m_uID)
                        {

                            if (notifyIcon.Click != null)
                            {
                               notifyIcon.Click(notifyIcon.eventObject, null);
                            }
                        }
                   }
                }
            }
        }
    }
}