HOWTO: Access MAPI Address Books with Active Messaging 1.1

ID: Q172093

The information in this article applies to:

SUMMARY

Active Messaging 1.1 supports programmatic access to MAPI Address Books through the AddressEntries collection of an AddressList object. Each AddressList object corresponds to a MAPI address book and is a member of the AddressLists collection of the Session object. The available Address Books can be enumerated by walking the AddressLists collection, and an individual address book can be selected by indexing the AddressLists collection by name or position. The sample below walks the AddressLists collection displaying information about each accessible Address Book. The second part of the sample selects the Global Address List and then walks the Address Entries, recursively expanding Distribution Lists.

MORE INFORMATION

The following sample code applies to any 32-bit VBA-based product.

WARNING: ANY USE BY YOU OF THE CODE PROVIDED IN THIS ARTICLE IS AT YOUR OWN RISK. Microsoft provides this code "as is" without warranty of any kind, either express or implied, including but not limited to the implied warranties of merchantability and/or fitness for a particular purpose.

Step-by-Step Example

1. Create a new VBA project. Add a Reference to Microsoft Active Messaging 

   1.1 Object Library.
2. Type the following code into a module: 

      Option Explicit

      Sub main()

          Dim objSession As MAPI.Session        ' use early binding for
                                                ' efficiency
          Dim collAddressLists As AddressLists
          Dim objAddressList As AddressList
          Dim collAddressEntries As AddressEntries

          On Error GoTo error_olemsg

          ' create a session and log on
          Set objSession = CreateObject("MAPI.Session")
          ' use a valid exchange profile name
          objSession.Logon ("<Your Profile Name Here>")

          'Walk the available Address Books
          Set collAddressLists = objSession.AddressLists
          For Each objAddressList In collAddressLists
               ' Display collection selection indices
               Debug.Print objAddressList.Name,
               Debug.Print objAddressList.Index,
               ' Display readonly access flag
               Debug.Print objAddressList.IsReadOnly,

               ' display count of recipients
               Set collAddressEntries = objAddressList.AddressEntries
               Debug.Print Str(collAddressEntries.Count)
               ' if any AddressEntries, display first recipient name
               If Not objAddressList.AddressEntries(1) Is Nothing Then _
                    Debug.Print objAddressList.AddressEntries(1).Name

          Next objAddressList

          ' Walk the Global Address List
          Set collAddressEntries = objSession.AddressLists( _
                   "Global Address List").AddressEntries
          WalkAddressList collAddressEntries

          'close session and logoff
          objSession.Logoff
          Exit Sub

      error_olemsg:
               MsgBox "Error " & Str(Err) & ": " & Error$(Err)
               Exit Sub

      End Sub

      ' Walk an AddressEntries collection recursively expanding
      ' Distribution Lists

      Sub WalkAddressList(collAddressEntries As AddressEntries)
          Dim objaddressEntry As AddressEntry

          For Each objaddressEntry In collAddressEntries
               ' Display the recipient's name
               Debug.Print objaddressEntry.Name,
               ' Display the recipient's type
               Select Case objaddressEntry.DisplayType
               Case ActMsgUser
                   Debug.Print "Exchange Recipient"
               Case ActMsgDistList
                   Debug.Print "Distribution List"
                   WalkAddressList objaddressEntry.Members
                   Debug.Print "End of DL " & objaddressEntry.Name
               Case ActMsgForum
                   Debug.Print "Public Folder"
               Case ActMsgAgent
                   Debug.Print "Agent"
               Case ActMsgPrivateDistList
                   Debug.Print "Private DL"
               Case ActMsgOrganization
                   Debug.Print "Organization"
               Case ActMsgRemoteUser
                   Debug.Print "Custom Recipient"
               Case Else
                   Debug.Print "Unknown type"
               End Select

          Next objaddressEntry

      End Sub
3. Visual Basic only: Set Sub Main to run in the Project Properties, and 
   then run.

   Other VBA applications: In the Debug/Immediate Window, type "MAIN"
   and press the ENTER key.
4. The output will appear in the Debug/Immediate window.

Notes

The address book can have restricted entries. These will generate an "Access Denied" message: 

   Error -2147024891: [Active Messaging - [E_ACCESSDENIED(80070005)]]
It is left up to the user to add extra error handling where required.

REFERENCES

Documentation for Active Messaging is available on MSDN under the SDK Documentation/Platform SDK/Databases and Messaging Services/Active Messaging topics.

The following Microsoft Knowledge Base article lists various sources for installing Active Messaging 1.1: 

   ARTICLE-ID: Q171440
   TITLE     : INFO: Where to Acquire the Collaboration Data Objects
               Libraries
For additional information about Collaboration Data Objects versus Active Messaging, please see the following article in the Microsoft Knowledge Base: 

   ARTICLE-ID: Q176916
   TITLE     : INFO: Active Messaging and Collaboration Data Objects (CDO)


Keywords          : kbprg kbAccess97 kbActMsg kbExcel kbMAPI KbVBA kbVBp400 kbVBp500 
Version           : WINDOWS:4.0 5.0 7.0 97
Platform          : WINDOWS
Issue type        : kbhowto

Last Reviewed: April 10, 1999