public void ShowBalloon(uint currentThreadID,uint iconId, string balloonTitle, string balloonText, uint balloonTimeout,NotifyCommand notifyCommand)
        {
            // find notify window
            m_foundNotifyWindow = false;
            EnumThreadWndProc enumThreadWndProc = new EnumThreadWndProc(FindNotifyWindowCallback);            
            EnumThreadWindows(currentThreadID, enumThreadWndProc, 0);
            if(m_foundNotifyWindow)
            {
                // show the balloon
                NotifyIconData notifyIconData = new NotifyIconData();
                notifyIconData.cbSize = (System.UInt32)System.Runtime.InteropServices.Marshal.SizeOf(typeof(NotifyIconData));
                notifyIconData.hWnd = m_notifyWindow;
                notifyIconData.uID = iconId;
                notifyIconData.uFlags = NotifyFlags.Info;
                notifyIconData.uTimeoutOrVersion = balloonTimeout;
                notifyIconData.szInfo = balloonText;
                notifyIconData.szInfoTitle = balloonTitle;
                Shell_NotifyIcon(notifyCommand, ref notifyIconData);
            }
        }
and calling as

m_notifyIcon.ShowBalloon(SDManagerProxy.GetCurrentThreadId(),0,"Exit..","Message",FrmStatusInformation.BALLOON_TIMEOUT,NotifyCommand.SetFocus);