The “Microsoft.VisualStudio.Tools.Applications.Deployment.FrameworkVersionMismatchException” is thrown due to the specific implementation of how VSTO 2010 runtime loads the appropriate CLR to install a VSTO customization. This exception is thrown when...

If you have written code that shows and hides context menu items in Outlook 2007, that code might not behave well in Outlook 2010. That is exactly what happened to this individual who recently posted to the VSTO forum. The command bar object model (which...

You can use two methods to trust an Office solution created in Visual Studio and not show a trust prompt to the end-user. Sign your Office solution with certificate that chains to a trusted root authority and is in the Trusted Publisher list. ...

Storing settings in the config File The app.config file is used for many purposes and one of common uses is for storing application settings like connection strings. For example, you can store a string to the web service reference used by your application...

An often-requested feature for VSTO add-ins is the ability to install an add-in for all users of a machine. Misha Shneerson had blogged about a workaround to enable this scenario here . This workaround is not recommended. Now, deploying an add-in to All...

A couple months ago Robert Green , VSTO MVP, started a series of step-by-step tutorials on building on Office 2007. Part 4 is now published. Thanks Robert! In this fourth part of the series of tutorials on Office Business Applications, learn how to create...

When you build a managed Office extension of any kind, you should ensure that your extension is isolated from other extensions that might be loaded into the application. You do this by creating a custom shim. VSTO solutions do not require custom shims...

Office 2010 now lets you activate tabs on the Ribbon. I gave this a try in a Outlook 2010 project and was very pleased with how easy it was to accomplish. Here are a couple of back-of-the-napkin examples that I chicken scratched over lunch. From the Ribbon...

A couple months ago Robert Green , VSTO MVP, started a series of tutorials on building on Office 2007. Yesterday we published part 3 of his step-by-step tutorials. Thanks Robert! In this third part of the series of tutorials on Office Business Applications...

Good news! Project 2010 supports custom task panes! Bad News! Getting one to appear in a Project 2010 is not so obvious. Good News! It’s a lot easier than I make it sound. In this post, I’ll show you how to add a custom task pane to Project 2010 by using...

During development of the VSTO 2010 Runtime we added a feature, dubbed Install on Demand , to support VSTO customizations that target both .NET Framework 3.5 and .NET Framework 4 without enforcing installation of both frameworks prior to installation...

Early last year we built a business application for order management for Northwind Traders on the Office and SharePoint platform using Visual Studio 2008 and Office & SharePoint 2007. Recently I started releasing articles on my blog that show how...

There have been a couple of blog posts about delay loading VSTO addins, and with Dev10 being released soon, it’s a good time to expand on the subject a little bit. This has been covered before, and I’ll avoid spending too much time here on topics that...

Visual Studio can help migrate your Outlook solutions from .NET Framework 3.5 to the .NET Framework 4. However, you still have to do a few things manually to make it all work.  Beth Massi converts an Outlook Solution that targets the .NET Framework...

You can add a custom group to the Message tab of an Outlook mail item.  For example, here is a custom group named "MyCoolGroup" that I added to the message tab of a new message: Outlook lets you open a message in the following two modes...

Last month Robert Green , VSTO MVP, started a series of tutorials on building on Office 2007. Today we published part 2 of his step-by-step tutorials. In this second part of the series of tutorials on Office Business Applications, learn how to create...

Office 2010 brings in many new features to the Ribbon and Backstage extensibility. In order to take advantage of those changes in VSTO addins, you will need to update your ribbon XML projects to use the new Office 2010 schema. First, you will need...

Last week we revamped the Learn pages on the VSTO Developer Center with more content that allows you to pivot on more fine-grained topics and tasks under each type of Office solution. We’ve changed the layout of these pages so that you can browse for...

Monday Office and SharePoint 2010 Beta were released to MSDN/TechNet subscribers. Today it was announced at PDC that these are available to the rest of the public! Come and get it… Office 2010 Beta SharePoint 2010 Beta These Betas are compatible with...

Office and SharePoint 2010 are available for MSDN Subscribers today: MSDN Subscribers: Office 2010 Beta is here. MSDN Subscribers: Microsoft Sharepoint 2010 Beta is here. These versions of Office and SharePoint are compatible with the Visual Studio 2010...

If you missed it, Office announced a compatibility program to help IT and developers who have built add-ins make a seamless upgrade to Office 2010.  We want you to have a successful and seamless migration to Office 2010 for your VSTO solutions. The...

I have previously posted how you can specify various properties for a VSTO solution like the Publisher and Product Names by tweaking a few files in Visual Studio 2008. With Visual Studio 2010 ( Beta 2 ) you can edit these properties directly through the...

One frequent customer question is about how to deploy an application and all of its prerequisites in a single .msi or .exe file. This question applies whether you are deploying any of the following: Microsoft Office 2003 solutions with dependencies on...

Robert Green , VSTO MVP, has started a series of tutorials on building on Office 2007! Thanks Robert!  In this first of a series of tutorials on building applications on Office you’ll learn how to create an Outlook 2007 customer appointment management...

Robert Hess posted an interview yesterday on Channel 9 with John Durant on Developing Managed Applications for Office 2010 in Visual Studio 2010 . When you have 20 minutes you should check it out. John provides some highlights as to what he’ll be showing...