Monitor a running instance of MS Word

My client has an automated instance of MS Word running as a service. The client does not have the source code and has requested I write a utility to monitor this running instance of Word to make sure it is functioning properly. I can monitor Word when a document is loaded and send out a NetSend message to several workstations if the document is sitting in Word in an active state for an extended period of time such as more than 5 minutes. But the problem is when the automated instance goes to "Save as" and gets stuck at that point. So, my question is, how would I determine that the running instance of Word is stuck at the "Save as" stage?

Complete source code of what I have follows:

Code:

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#pragma warning disable 0168
using System;
using System.Collections.Generic;
using System.IO;
using System.Text;
using System.Windows.Forms;
using System.Threading;
using System.Reflection;
using Office = Microsoft.Office.Core;
using System.Runtime.InteropServices;
using System.Data.OleDb;
using System.Collections;

namespace WordMonitorApplication
{
    class ThreadData
    {
        public int iSeconds = 60;
        public int iTotalMinutes = 5;
    }

    class WordMonitor
    {
 
        static void Main(string[] args)
        {
            ThreadData threaddata = new ThreadData();
       
            if (args.Length > 1)
                threaddata.iSeconds = int.Parse(args[1]);
            if(args.Length > 2)
                threaddata.iTotalMinutes = int.Parse(args[2]);

            Console.WriteLine("Parameters:  ISeconds = {0}  iTotalMinutes = {1}", threaddata.iSeconds, threaddata.iTotalMinutes);
            ArrayList myList = new ArrayList();
            ReadAccessMDB.ReadMDB(myList);
            ThreadContainer objContainer = new ThreadContainer(myList);

            Thread objThread = new Thread(new ParameterizedThreadStart(objContainer.RunWordMonitor));
            objThread.Start(threaddata);
        }

        class ThreadContainer
        {
            ArrayList MyNetNameList;

            public ThreadContainer(ArrayList inputList)
            {
                MyNetNameList = inputList;
            }

            public void RunWordMonitor(object obj)
            {
                Word.Application wdapp;
                DateTime startTime = DateTime.Now;
                bool bMessageSent = false;
                string DocName = null;
                string TempString = null;
                string ErrorMsg;
                ThreadData threaddata = (ThreadData)obj;
                //  CreateLogFiles Err = new CreateLogFiles();
              //  Err.ErrorLog("error.log","App Started");
                while (true)
                {
                    try
                    {
                        //Get the reference to Word.Application from the ROT.
                        wdapp = (Word.Application)System.Runtime.InteropServices.Marshal.GetActiveObject("Word.Application");
                        wdapp.Activate();
                     
                        if (String.Compare(DocName, wdapp.ActiveDocument.Name) == 0)
                        {
                            DateTime stopTime = DateTime.Now;
                            TimeSpan duration = stopTime - startTime;
                            TempString  = String.Format("Open File: {0}      Duration: {1:0.00}", wdapp.ActiveDocument.Name, duration.TotalMinutes); 
                          // TempString = "Open File: " + wdapp.ActiveDocument.Name + " Duration: "  + duration.TotalMinutes + " Minutes";
                        Console.WriteLine(TempString);
                            if (duration.TotalMinutes > threaddata.iTotalMinutes)
                            {
                                if (bMessageSent == false)
                                {
                                    bMessageSent = true;
                                    string srcComputer;

                                    //Retrieve the NetBIOS name.
                                    srcComputer = System.Environment.MachineName;
                                    ErrorMsg = "Grid Processor cannot process " + wdapp.ActiveDocument.Name;
                                    foreach (string desComputer in MyNetNameList)
                                    {
                                        // Send the message to all the workstations
                                        SendNetMsg.SendMessage(srcComputer, desComputer, ErrorMsg);
                                        TempString = "Message sent to: " + desComputer;
                                        Console.WriteLine(TempString);
                                    }
                                }
                            }
                        }
                        else
                        {
                            startTime = DateTime.Now;
                            bMessageSent = false;
                            DocName = wdapp.ActiveDocument.Name;
                      //      TempString = "In else docName  = " + DocName;
                        //    Err.ErrorLog("error.log", TempString);
                        }
                    }
                    catch (Exception ex)
                    {
                      //  Console.WriteLine(ex.Message);
                    }
                    finally
                    {
                        //Release the reference.
                        wdapp = null;
                    }
                    Thread.Sleep(1000 * threaddata.iSeconds);
                }

            }
        }
    }
    public class SendNetMsg
    {
        const int NERR_Success = 0;
        const int NERR_BASE = 2100;
        const int NERR_NameNotFound = (NERR_BASE + 173); // The message alias could not be found on the network.
        const int NERR_NetworkError = (NERR_BASE + 36);  // A general network error occurred.
        const int ERROR_ACCESS_DENIED = 5;
        const int ERROR_INVALID_PARAMETER = 87;
        const int ERROR_NOT_SUPPORTED = 50;

        [DllImport("netapi32.dll")]
        public static extern int NetMessageBufferSend(
            [MarshalAs(UnmanagedType.LPWStr)] string servername,
            [MarshalAs(UnmanagedType.LPWStr)] string msgname,
            [MarshalAs(UnmanagedType.LPWStr)] string fromname,
            [MarshalAs(UnmanagedType.LPWStr)] string buf,
            int buflen);

        public static void SendMessage(string srcName, string dstName, string Msg)
        {
            int retVal = NetMessageBufferSend(null, dstName, srcName, Msg, Msg.Length * 2);

            if (retVal == NERR_NameNotFound)
                Console.WriteLine("Error: NERR_NameNotFound");
            else if (retVal == NERR_NetworkError)
                Console.WriteLine("Error: NERR_NetworkError");
            else if (retVal == ERROR_ACCESS_DENIED)
                Console.WriteLine("Error: ERROR_ACCESS_DENIED");
            else if (retVal == ERROR_INVALID_PARAMETER)
                Console.WriteLine("Error: ERROR_INVALID_PARAMETER");
            else if (retVal == ERROR_NOT_SUPPORTED)
                Console.WriteLine("Error: ERROR_NOT_SUPPORTED");
            else if (retVal != 0)
                Console.WriteLine("Unknown error returned.\nError code {0}", retVal);
        }
    }

    public class ReadAccessMDB
    {
        public static void ReadMDB(ArrayList theArrayList)
        {
            string connectionString = GetConnectionString();
            string queryString =
                "SELECT NetName FROM NetNames;";
            using (OleDbConnection connection =
                      new OleDbConnection(connectionString))
            {
                OleDbCommand command = connection.CreateCommand();
                command.CommandText = queryString;

                try
                {
                    connection.Open();

                    OleDbDataReader reader = command.ExecuteReader();

                    while (reader.Read())
                    {
                        // Console.WriteLine("{0}", reader[0]);
                        theArrayList.Add(reader[0]);
                    }
                    reader.Close();
                }
                catch (Exception ex)
                {
                    Console.WriteLine(ex.Message);
                }
            }
        }

        static private string GetConnectionString()
        {
            return "Provider=Microsoft.Jet.OLEDB.4.0;Data Source="
                + "WordMon.mdb;";
        }
    }
    public class CreateLogFiles
    {
        private string sLogFormat;
        private string sErrorTime;

        public CreateLogFiles()
        {
            //sLogFormat used to create log files format :
            // dd/mm/yyyy hh:mm:ss AM/PM ==> Log Message
            sLogFormat = DateTime.Now.ToShortDateString().ToString() + " " + DateTime.Now.ToLongTimeString().ToString() + " ==> ";

            //this variable used to create log filename format "
            //for example filename : ErrorLogYYYYMMDD
            string sYear = DateTime.Now.Year.ToString();
            string sMonth = DateTime.Now.Month.ToString();
            string sDay = DateTime.Now.Day.ToString();
            sErrorTime = sYear + sMonth + sDay;
        }

        public void ErrorLog(string sPathName, string sErrMsg)
        {
            StreamWriter sw = new StreamWriter(sPathName + sErrorTime, true);
            sw.WriteLine(sLogFormat + sErrMsg);
            sw.Flush();
            sw.Close();
        }
    }
}

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