アウトルックのアドレス帳アクセス

    private void AccessContacts(string findLastName)
    {
        var app = new Microsoft.Office.Interop.Outlook.Application();
        Outlook.MAPIFolder folderContacts = app.ActiveExplorer().Session.
            GetDefaultFolder(Outlook.OlDefaultFolders.olFolderContacts);
        Outlook.Items searchFolder = folderContacts.Items;
        int counter = 0;
        foreach (Outlook.ContactItem foundContact in searchFolder)
        {
            if (foundContact.LastName.Contains(findLastName))
            {
                foundContact.Display(false);
                MessageBox.Show(foundContact.HomeTelephoneNumber.ToString());
                counter = counter + 1;
            }
        }
        MessageBox.Show("You have " + counter +
            " contacts with last names that contain "
            + findLastName + ".");
    }
}