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How to use the Microsoft Outlook Object Library to retrieve an appointment by using Visual C#


This article describes how to use the Microsoft Outlook 2002 Object Library or the Microsoft Office Outlook 2003 Object Library to retrieve an appointment by using Microsoft Visual C#.

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To use the Outlook 2002 Object Library or the Outlook 2003 Object Library to retrieve an appointment in a Visual C# .NET project, follow these steps:

  1. In Microsoft Visual Studio .NET or in Microsoft Visual Studio 2005, create a new Console Application project:

    1. On the File menu, point to New, and then select Project.
    2. Under Project Types, select Visual C# Projects.


      In Visual Studio 2005, select Visual C# under Project Types.

    3. Under Templates, select Console Application.
    4. Select OK. By default, a file that is named Class1.cs is created.


      In Microsoft Visual C# 2005, Program.cs is created by default.

  2. Add a reference to either the Outlook 2002 Object Library or the Outlook 2003 Object Library. To do this, follow these steps:

    1. On the Project menu, select Add Reference.

    2. Select the COM tab.

    3. On the COM tab, select Microsoft Outlook 11.0 Object Library if you are using Outlook 2003, or select Microsoft Outlook 10.0 Object Library if you are using Outlook 2002.

    4. Select Select.


      In Visual Studio 2005, you do not have to click Select.

    5. In the Add References dialog box, select OK.


      If you receive a message to generate wrappers for the libraries that you selected, click Yes.

  3. In the Class1.cs code window, replace all the existing code with the following code:

    using System;
    using System.Reflection; // to use Missing.Value
    //TO DO: If you use the Microsoft Outlook 11.0 Object Library, uncomment the following line.
    //using Outlook = Microsoft.Office.Interop.Outlook;
    namespace RetrieveAppointment
        /// <summary>
        /// Summary description for Class1.
        /// </summary>
        public class Class1
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        public static int Main(string[] args)
        // Create the Outlook application.
        Outlook.Application oApp = new Outlook.Application();
    // Get the NameSpace and Logon information.
        // Outlook.NameSpace oNS = (Outlook.NameSpace)oApp.GetNamespace("mapi");
        Outlook.NameSpace oNS = oApp.GetNamespace("mapi");
    //Log on by using a dialog box to choose the profile.
        oNS.Logon(Missing.Value, Missing.Value, true, true); 
    //Alternate logon method that uses a specific profile.
        // TODO: If you use this logon method, 
        // change the profile name to an appropriate value.
        //oNS.Logon("YourValidProfile", Missing.Value, false, true); 
    // Get the Calendar folder.
        Outlook.MAPIFolder oCalendar = oNS.GetDefaultFolder(Outlook.OlDefaultFolders.olFolderCalendar);
    // Get the Items (Appointments) collection from the Calendar folder.
        Outlook.Items oItems = oCalendar.Items;
    // Get the first item.
        Outlook.AppointmentItem oAppt = (Outlook.AppointmentItem) oItems.GetFirst();
    // Show some common properties.
        Console.WriteLine("Subject: " + oAppt.Subject);
        Console.WriteLine("Organizer: " + oAppt.Organizer);
        Console.WriteLine("Start: " + oAppt.Start.ToString());
        Console.WriteLine("End: " + oAppt.End.ToString());
        Console.WriteLine("Location: " + oAppt.Location);
        Console.WriteLine("Recurring: " + oAppt.IsRecurring);
    //Show the item to pause.
    // Done. Log off.
    // Clean up.
        oAppt = null;
        oItems = null;
        oCalendar = null;
        oNS = null;
        oApp = null;
    //Simple error handling.
        catch (Exception e)
        Console.WriteLine("{0} Exception caught.", e);
    //Default return value
        return 0;
  4. In this code, make any necessary changes where you see the "TO DO" comments.

  5. Press F5 to build and then run the program. Outlook security features may display additional dialog boxes before the appointment information appears.


For more information, see Microsoft Office Development with Visual Studio.