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Updated solution for a custom form list box bound to a keywords field

On an Outlook custom form, if you bind a multi-select list box to a keywords field and populate the list box's rows in code, the list box will have no selected rows when the user reopens a previously saved item, making it look like the user's data has been lost. The Form Controls Demo form has been updated to demonstrate a workaround for this issue.

The problem apparently is that the field value is applied to the control before the list box rows are populated. The solution is to use code in the form's Item_Open event handler to select the appropriate rows after the list rows have been populated, but -- to add to the complications -- it is not possible to access the value of a custom keywords field directly. A workaround for that issue is to bind a text box to the keywords property and read the value from the text box control; see More Fun with Keywords. To simplify the process of finding the row whose text matches a particular value in the keywords field, the code uses a Scripting.Dictionary object to hold the same values as the data used to populate the rows and handle the lookup.

To see the solution, download Form Controls Demo.zip (9kb, 9 Jul 09), unzip it, open the .oft file, and publish that form. Then use the published form to create a new task.

This form also demonstrates two other ways of handling a multi-select list box and two ways to handle option buttons. For more information on those controls and others, see Controls on Outlook Forms.

New hotfix for Outlook 2007 - June 30, 2009

The June 30, 2009, hotfix package for Outlook 2007 fixes several developer issues:

A new ReliableFolderMoveEvent registry entry solves a problem with the BeforeFolderMove event ceasing to fire after a while.

When applications create new categories programmatically, those categories should now still be available after a restart of Outlook.

Custom form icons that weren't displaying on Windows Vista with a high DPI display (for example, 120 DPI) should now display correctly.

In Cached Exchange Mode with the reading pane active, messages based on custom forms that have VBScript code behind them should no longer increase CPU usage or crash Outlook.

The hotfix also resolves a problem with accessing fields in CDO 1.21 applications.

Outlook 2007 Programming chapters available on MSDN

Three chapters from Sue Mosher's Microsoft Outlook 2007 Programming book are now available on MSDN:

Sample code for these chapters is available from the get Sue's code link at the top of the page.

Outlook 2007 performance improvements in SP2

Office 2007 Service Pack 2 targets Outlook with a long list of performance improvements related to .ost and .pst files, startup, shutdown, and folder switching. For details, see:

Outlook 2010: No support for Exchange client extensions

Back before Microsoft extended Outlook with support for add-ins, beginning with Outlook 2000, developers added functionality to Outlook by building Exchange client extensions -- or ECEs -- using the Extended MAPI programming interface. Microsoft in fact built its own ECEs to manage such Outlook features as deleted item recovery.

Beginning with Outlook 2010, ECEs will not load in Outlook, according to Randy Byrne of the Outlook team. Randy provides more background on ECEs in his article for the Outlook team blog, where he explains the options that ECE developers face if they want to redesign their applications to work in Outlook 2010 and asks for your feedback, especially your concerns about parity between ECE and add-in capabilities.

From the Forums

Basic Outlook Techniques
TO get the path of VS solution file in Connect.cs...
How can i read the signatur from Outlook...
Hi Sue How can I read the default signature with VB.Net outllook from 2007? The Code below doesn't work with Outlook Version 2007. 'Version 10.0 bRegKey = oShell.RegRead("HKCU\Software\Microsoft\Office\10.0\Common\MailSettings\NewStationery") If...
Outlook Form Design
Fill in the blank placeholder field?
I have an Outlook form for which I would like to have a "fill in the blank placeholder" in the body of the form that when someone started typing in, the placeholder would dissappear. Is this possible? For example: If you have the following first...
Item_Write = False is allowing drags from...
I have a custom appointment form, and used a piece of code I got here to prevent an appointment from being dragged to a new time slot accidentally, and it has been working great. I have copied the code below. I just noticed something new about it though....
Outlook Expert Techniques
How to call WebDav Hierarchical Traversal...
Hi, We are creating an Outlook com addin using vb. I am trying to retrieve all the public folders from Exchange using WEBDav Hierarchical Traversal search. But this requires the exchange url, userid and password to be passed when you do any query. Is...
TO get the path of VS solution file in Connect.cs...
Outlook and .NET
program rules to move mail to specified folder...
Hi, I am using a vb 2008 program that sends mail to specified email addresses, creates a folder in the Inbox folder of Outlook 2007, I am looking to program a rule that moves mails based on either the subject or body text. I am having problems with the...
Adding Email address in your code
Sue’s – How can I update your great code below to show both recipient’s name and email addresses (with domain) in To/CC. Private Sub Application_ItemSend _ (ByVal Item As Object, Cancel As Boolean) Dim strMsg as String strMsg = "To recipients =...
Code Essentials
TO get the path of VS solution file in Connect.cs...
Searching for vba script support
Hello from St. Petersburg, I'm looking for a new partner/support for my small and mid size Outlook customization projects which I realize from time to time in St. Petersburg. My previous partner who did the programming part has no time anymore. I'm...

Newest Resources

Print all attachments at once using VBA -- Udi Shitrit shows how to use the Win32 to print all of a message's attachments -- no need to know the file types involved.

Outlook 2010 MAPI Reference -- Official Microsoft reference for MAPI development against Outlook 2010. Header files are also available.

Enter the 64 Bit MAPI Dragon -- Outlook 2010 will be available as both a 32-bit and a 64-bit application. Stephen Griffin previews Microsoft's plans and documentation for 64-bit MAPI support.

(Less than) Portable Search Folders -- Stephen Griffin explains why search folders created by Outlook object model code may not always work and offers a partial solution.

How to programmatically select a custom Form Region -- Helmut Obertanner demonstrates, with screen shots, how to create a form region for an Outlook 2007 contact form and add a button to the Ribbon to switch the Inspector display to the region.

Customize the built-in Outlook Select Names dialog (or any other) -- Helmut Obertanner demonstrates how to intercept an built-in Outlook dialog and display instead a custom .NET form.

Outlook Forms Step by Step -- Create a check request form and make it available on the company intranet with this 16-part illustrated guide.

Visual Studio Tools for Office 2007: VSTO for Excel, Word, and Outlook -- Eric Carter and Eric Lippert update their book on creating Visual Studio Tools for Office applications to cover Visual Studio 2008 and Office 2007.

Outlook Redemption version 4.7 -- Adds the ability to enumerate nicknames stored in the .nk2 file and an RDOStore2.Searches collection that represents search folders, plus other new properties, methods, and events and various bug fixes.

Outlook-Redemption discussion list -- Yahoo! group for dicussing issues related to the Outlook Redemption COM library

Making a Custom Ribbon Appear Only for a Custom Outlook Form -- Norm Estabrook from the VSTO team shows how to make custom tabs, groups and controls appear only in cases where the user opens a custom form in Outlook.

LINQ to DASL: Changing Appointments with C# and LINQ -- Short video that demonstrates how to use VSTO Power Tools to perform a DASL query on the Calendar folder using the LINQ syntax and then perform additional string value checking with a regular expression

Outlook Context Menus and Creating a Meeting from an Email -- Short video demonstrating how to create a context menu command for sending a meeting request to recipients of an email message. Note: The Inspector wrapper class is extraneous and overcomplicates the project.

How to get the IWin32Window for Outlook -- This C# class from Helmut Obertanner could be used to pass the Outlook as parent to .Net Forms and Messageboxes to prevent those UI elements from being hidden by Outlook windows.

Additional custom panel in Microsoft Outlook -- Lukas Neumann uses Windows API techniques to hack the Outlook user interface and add a custom panel in the Explorer window.

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