2008 VSTO Runtime v3

Also referred to as Visual Studio 2008 VSTO Runtime.
Works with .NET Framework 3.5
Microsoft Office 2007 or 2003
vstor30.exe
These are the office extension dlls when targetting .NET 3.5

FileName	Comments
Microsoft.Office.Tools.Common.v9.0.dll	Provides the base class Microsoft.Office.Tools.AddIn used in all application-level add-ins. Includes all the ribbon objects in the following namespace: Microsoft.Office.Tools.Ribbon
Microsoft.Office.Tools.Excel.v9.0.dll	Provides host items and host controls for Excel solutions
Microsoft.Office.Tools.Word.v9.0.dll	Provides host items and host controls for Word solutions
Microsoft.Office.Tools.Outlook.v9.0.dll	Provides classes to help you create custom form regions
Microsoft.Office.Tools.v9.0.dll	Provides data binding capabilities for host controls in document-level customisations
Microsoft.VisualStudio.Tools.Applications.Runtime.v9.0.dll	Provides the ICachedType interface which you can use to cache data objects I a document-level customisation
Microsoft.VisualStudio.Tools.Applications.Runtime.v10.0.dll	Provides the IAddInPostDeploymentAction interface which you can use to run additional installation steps as part of a clickonce installation
Microsoft.VisualStudio.Tools.Applications.ServerDocument.v9.0.dll
Microsoft.VisualStudio.Tools.Applications.ServerDocument.v10.0.dll
Microsoft.VisualStudio.Tools.Applications.Hosting.v9.0.dll	Provides classes used with custom actions
Microsoft.VisualStudio.Tools.Office.Runtime.v9.0.dll	Provides types to help you create user inclusion list entries to grant trust to your solution.
Microsoft.VisualStudio.Tools.Office.Runtime.v10.0.dll
Microsoft.VisualStudio.Tools.Office.AppInfoDocument.v9.0.dll
Microsoft.VisualStudio.Tools.Office.Contract.v9.0.dll