Dear Friends,

I tried Application.DoEvents() and it worked fine. But it is very
slow. Is there a better way? What is "some state-object"? follwoing is
my complete code:

       private Hashtable ImportOrganization(string sheetName,
ExcelUtility excelUtility)
       {
           Hashtable result = new Hashtable();

           const int nameCol = 1;
           const int orgIdCol = 2;
           const int telCol = 3;
           const int faxCol = 4;
           const int addressCol = 5;

           excelUtility.LoadWorksheet(sheetName);
           int rowIndex = startingRow;
           string rowIdentifier = excelUtility.ReadCell(rowIndex,
startingCol);
           while (!String.IsNullOrEmpty(rowIdentifier))
           {
               Global.AddMessage(rtbCount, rowIndex);
               Faraconesh.BusinessFramework.Common.Organization
organization = new Faraconesh.BusinessFramework.Common.Organization();
               organization.Name = excelUtility.ReadCell(rowIndex,
startingCol + nameCol);
               organization.OrgId = excelUtility.ReadCell(rowIndex,
startingCol + orgIdCol);
               organization.Tel = excelUtility.ReadCell(rowIndex,
startingCol + telCol);
               organization.Fax = excelUtility.ReadCell(rowIndex,
startingCol + faxCol);
               organization.Address = excelUtility.ReadCell(rowIndex,
startingCol + addressCol);

               if (result.ContainsKey(rowIdentifier))
                   throw new Exception("duplicate row number");
               else
               {
                   organization.RuntimeState =
Faraconesh.ApplicationFramework.Common.RuntimeState.Added;

Faraconesh.BusinessFramework.Common.CommonService.Instance.UpdateOrganization(organization);
                   result.Add(rowIdentifier, organization);
               }
               rowIdentifier = excelUtility.ReadCell(++rowIndex,
startingCol);
               Application.DoEvents();
           }
           return result;
       }

       internal static void AddMessage(RichTextBox rtb, int intParam)
       {
           AddMessage(rtb, intParam.ToString());
       }

       internal static void AddMessage(RichTextBox rtb, string
stringParam)
       {
           const int maxLength = 4;
           rtb.Text += stringParam + "\n";
           if (rtb.Lines.Length > maxLength)
           {
               string[] oldLines = rtb.Lines;
               string[] newLines = new string[maxLength];
               for (int i = 0; i < maxLength; i++)
                   newLines[i] = oldLines[i + 1];
               rtb.Lines = newLines;
           }
       }
   }

thanks,
afshar