2010 VSTO Runtime v4

Also referred to as Visual Studio 2010 VSTO Runtime
Works with .NET Framework 4.0, 4.5, 4.6, 4.7, 4.8
Microsoft Office 365, 2021, 2019, 2016, 2013 or 2010
This version needs to be included as a dependency (and installed if necessary) with any add-ins that use VSTO.
vstor_redist.exe

FileName	Comments
Extensibility.dll	Extensibility (for Visual Studio) This provides the IDTExtensibility2 interface and this is included because it is possible to create add-ins for Visual Studio itself. C:\Program Files\Common Files\Microsoft Shared\MSEnv\PublicAssemblies\Extensibility.dll
Microsoft.Office.Core.dll	Contains the core objects that are shared across all the different applications.
Microsoft.Office.Tools.Common.dll	Contains types for creating Ribbon customisations and types for creating action panes. Note that smart tags have been depreciated in Excel and Word 2010.
Microsoft.Office.Tools.Common.v4.0.Utilities.dll	Provides the base classes for the ThisAddin class used in application-level solutions This is not included in the VSTO Runtime redistributable and must be deployed with your solution. If you are using ClickOnce these are automatically included in the generated package. You cannot embed interop types from this assembly
Microsoft.Office.Tools.dll	Contains types that are used by the vsto runtime itself. These are not meant to be called directly.
Microsoft.Office.Tools.Excel.dll	Contains interfaces that represent host items, host controls and their supporting types. C:\Program Files\Reference Assemblies\Microsoft\VSTO40\v4.0.Framework\
Microsoft.Office.Tools.Excel.v4.0.Utilities.dll	Provides the base classes for the ThisWorkbook and Sheet classes in a document-level solution and windows form controls that you can use on a worksheet. This is not included in the VSTO Runtime redistributable and must be deployed with your solution. If you are using ClickOnce these are automatically included in the generated package. You cannot embed interop types from this assembly
Microsoft.Office.Tools.Outlook.dll	Contains types that you can use to create custom form regions.
Microsoft.Office.Tools.Outlook.v4.0.Utilities.dll	Provides base classes for the generated ThisAddIn and outlook form region classes. This is not included in the VSTO Runtime redistributable and must be deployed with your solution. If you are using ClickOnce these are automatically included in the generated package.
Microsoft.Office.Tools.v4.0.Framework.dll	Contains types for exceptions that can be thrown by the vsto runtime as well as attributes you can use when creating outlook form regions. You cannot embed interop types from this assembly
Microsoft.Office.Tools.Word.dll	Contains interfaces that represent host items, host controls and their supporting types.
Microsoft.Office.Tools.Word.v4.0.Utilities.dll	Provides the base classes for the ThisDocument class in a document-level solution and windows form controls that you can use on a document. This is not included in the VSTO Runtime redistributable and must be deployed with your solution. If you are using ClickOnce these are automatically included in the generated package.
Microsoft.Vbe.Interop.dll	Microsoft Visual Basic for Applications Extensibility 5.3 Provides objects for working with the Visual Basic Editor C:\Program Files\Common Files\Microsoft Shared\VBA\VBA6\VBE6EXT.OLB
Microsoft.VisualStudio.Tools.Applications.Runtime.dll	Contains types for the ICachedType interface, IAddInPostDeploymentAction interface and other types that are part of the vsto runtime. These are not meant to be called directly. (10.0.31125) Visual Studio 2010 SP1 (10.0.31007) (10.0.30319)
Microsoft.VisualStudio.Tools.Applications.ServerDocument.dll	Contains types for the ServerDocument class and several classes that represent the hierarchy of cached data in a document-level customisatoin.
MSCOMCTL
stdole	Provides basic COM types as well as the IPictureDisp data type Can also be found in the following location: C:\Program Files\Microsoft.NET\Primary Interop Assemblies\ C:\Program Files\Common Files\Microsoft Shared\MsEnv\PublicAssemblies\ C:\Program Files\Microsoft Visual Studio 12.0\Visual Studio Tools for Office\PIA\Common\

Specific Versions

Version	Release Date
10.0.60825	2016 - September
10.0.60724	2015 - July
10.0.50903	2014 - September
10.0.50701	2014 - July. Supports .NET Framework 4.5.2
10.0.50325	2014 - April
10.0.40820	2013 - November
10.0.31125	2013 - January. Visual Studio 2010 SP1
10.0.31119	2012 - November. Supports both 32 and 64 Bit Version
10.0.31007	2011 - April. Supports 64 Bit Version
10.0.30319	2010 - November. Introduced Fast Path Loading
10.0.0	2010 - April. Supports 32 Bit Version