User FAQs

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1) Can you describe Ribbon Customisation ?
Allows you to add (or replace) functionality to existing tabs, create new tabs, groups and commands
This can be done in two ways:
*) Using the CustomUI Editor to embed XML markup into the open xml format.
*) Using Visual Studio using to create a VSTO or COM add-in.

2) What is the Office namespace used for ?
This namespace and assembly contains the core objects that are shared across all the different Office applications.

Office = Microsoft.Office.Core 

This is one the Primary Interop Assemblies and is automatically added when you create a new VSTO add-in.
This is the Office 2016 version of this file.
This assembly was compiled against .NET runtime 2.0.50727
This can be added from the Extension tab.

Folder - C:\Program Files (x86)\Microsoft Visual Studio\Shared\Visual Studio Tools for Office\PIA\Office15\Office.dll 

3) What is the Microsoft.Office.Core namespace used for ?
This is the Office 365 version of the same file and is not a Primary Interop Assembly.
This is the latest file and should really be the one that you should be using.
This can be added from the COM tab.

Folder - C:\Program Files\Microsoft Office\Root\VFS\ProgramFilesCommonX86\Microsoft Shared\Office16\MSO.dll