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How to: Get the Global Address List or a Set of Address Lists for a Store

This topic contains two code examples that show how to get the Global Address List (GAL) that is associated with a store, and how to get all of the address lists that are associated with a store.

In a Microsoft Outlook session where multiple Microsoft Exchange accounts are defined in the profile, there can be multiple address lists associated with a store. In each of the following code examples, the specific store of interest is the store for the current folder displayed in the active explorer, but the algorithm to get a Global Address List or a set of AddressList objects for a store applies to any Exchange store.

The first code example contains the DisplayGlobalAddressListForStore method and the GetGlobalAddressList function. The DisplayGlobalAddressListForStore method displays, in the Select Names dialog box, the Global Address List that is associated with the current store. DisplayGlobalAddressListForStore first obtains the current store. If the current store is an Exchange store, GetGlobalAddressList is called to obtain the Global Address List associated with the current store. GetGlobalAddressList uses the PropertyAccessor object and the MAPI property http://schemas.microsoft.com/mapi/proptag/0x3D150102 to obtain the PR_EMSMDB_SECTION_UID property of an address list and the current store. GetGlobalAddressList identifies an address list as associated with a store if their PR_EMSMDB_SECTION_UID properties match, and the address list is the Global Address List if its AddressListType property is olExchangeGlobalAddressList. If the call to GetGlobalAddressList succeeds, DisplayGlobalAddressListForStore uses the SelectNamesDialog object to display the returned Global Address List in the Select Names dialog box.

If you use Microsoft Visual Studio to test this code example, you must first add a reference to the Microsoft Outlook 14.0 Object Library component and specify the Outlook variable when you import the Microsoft.Office.Interop.Outlook namespace. The using statement must not occur directly before the functions in the code example but must be added before the public Class declaration. The following line of code shows how to do the import and assignment in C#.

using Outlook = Microsoft.Office.Interop.Outlook;
void DisplayGlobalAddressListForStore()
{
    Outlook.Folder currentFolder =
        Application.ActiveExplorer().CurrentFolder
        as Outlook.Folder;
    Outlook.Store currentStore = currentFolder.Store;
    if (currentStore.ExchangeStoreType !=
        Outlook.OlExchangeStoreType.olNotExchange)
    {
        Outlook.SelectNamesDialog snd = 
            Application.Session.GetSelectNamesDialog();
        Outlook.AddressList addrList = 
            GetGlobalAddressList(currentStore);
        if (addrList != null)
        {
            snd.InitialAddressList = addrList;
            snd.Display();
        }
    }
}

public Outlook.AddressList GetGlobalAddressList(Outlook.Store store)
{
    string  PR_EMSMDB_SECTION_UID = 
        @"http://schemas.microsoft.com/mapi/proptag/0x3D150102";
    if (store == null)
    {
        throw new ArgumentNullException();
    }
    Outlook.PropertyAccessor oPAStore = store.PropertyAccessor;
    string storeUID = oPAStore.BinaryToString(
        oPAStore.GetProperty(PR_EMSMDB_SECTION_UID));
    foreach (Outlook.AddressList addrList 
        in Application.Session.AddressLists)
    {
        Outlook.PropertyAccessor oPAAddrList = 
            addrList.PropertyAccessor;
        string addrListUID = oPAAddrList.BinaryToString(
            oPAAddrList.GetProperty(PR_EMSMDB_SECTION_UID));
        // Return addrList if match on storeUID
        // and type is olExchangeGlobalAddressList.
        if (addrListUID == storeUID && addrList.AddressListType ==
            Outlook.OlAddressListType.olExchangeGlobalAddressList)
        {
            return addrList;
        }
    }
    return null;
}

The second code example contains the EnumerateAddressListsForStore method and GetAddressLists function. The EnumerateAddressListsForStore method displays the type and resolution order of each address list defined for the current store. EnumerateAddressListsForStore first obtains the current store, and then calls GetAddressLists to obtain a .NET Framework generic List<T> object that contains AddressList objects for the current store. GetAddressLists enumerates each address list defined for the session, uses the PropertyAccessor object and the MAPI named property http://schemas.microsoft.com/mapi/proptag/0x3D150102 to obtain the PR_EMSMDB_SECTION_UID property of an address list, and the PR_EMSMDB_SECTION_UID property of a current store. GetGlobalAddressList identifies an address list as associated with a store if their PR_EMSMDB_SECTION_UID properties match, and returns a set of address lists for the current store. EnumerateAddressListsForStore then uses the AddressListType and ResolutionOrder properties of the AddressList object to display the type and resolution order for each returned address list.

private void EnumerateAddressListsForStore()
{
    Outlook.Folder currentFolder =
        Application.ActiveExplorer().CurrentFolder
        as Outlook.Folder;
    Outlook.Store currentStore = currentFolder.Store;
    List<Outlook.AddressList> addrListsForStore = 
        GetAddressLists(currentStore);
    foreach (Outlook.AddressList addrList in addrListsForStore)
    {
        Debug.WriteLine(addrList.Name 
            + " " + addrList.AddressListType.ToString()
            + " Resolution Order: " +
            addrList.ResolutionOrder);
    }
}
public List<Outlook.AddressList> GetAddressLists(Outlook.Store store)
{
    List<Outlook.AddressList> addrLists = 
        new List<Microsoft.Office.Interop.Outlook.AddressList>();
    string PR_EMSMDB_SECTION_UID =
        @"http://schemas.microsoft.com/mapi/proptag/0x3D150102";
    if (store == null)
    {
        throw new ArgumentNullException();
    }
    Outlook.PropertyAccessor oPAStore = store.PropertyAccessor;
    string storeUID = oPAStore.BinaryToString(
        oPAStore.GetProperty(PR_EMSMDB_SECTION_UID));
    foreach (Outlook.AddressList addrList
        in Application.Session.AddressLists)
    {
        Outlook.PropertyAccessor oPAAddrList =
            addrList.PropertyAccessor;
        string addrListUID = oPAAddrList.BinaryToString(
            oPAAddrList.GetProperty(PR_EMSMDB_SECTION_UID));
        // Return addrList if match on storeUID
        // and type is olExchangeGlobalAddressList.
        if (addrListUID == storeUID)
        {
            addrLists.Add(addrList);
        }
    }
    return addrLists;
}

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