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Questions tagged [add-in]

AddIn (Add-In or Add In) is a synonym for plugin - a program that is triggered by a host program allowing third party developers to manipulate or extend the hosting program.

Add-In (AddIn or Add In) is a synonym for - a program that is triggered by a host program allowing third party developers to manipulate or extend the hosting program.

Typically, whether these programs are called "addins" or "plugins" depends on the programming language and platform. For example, in they are called plugins whereas in they are called addins. Some programs also call them "addons". In any case, these programs add or extend functionality to an existing program.

In most cases the hosting program will expose an extensibility interface to the hosted code, allowing it to execute tasks.

The most used types of Add-Ins are those automating the Microsoft Office programs (Word, Excel, Powerpoint, Outlook), browsers (Internet Explorer), IDEs - Visual Studio. But other non-Microsoft programs provide COM Extensibility as well (Skype, Altova software products, Photoshop, AutoCAD and many others).

In most cases the Add-Ins use COM object interfaces (that allow the Add-In code, if started from a standalone executable to instantiate the host program and then manipulate it) exposed by the hosting software.

Links:

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How can we host a taskpane.html in a local dev server? As I know, office.js does not allow it to be loaded outside the office app

I do hope I can load the taskpane.html outside the office app, which is for powerpoint add-ins actually. Because I need to run automation test. As I know, the office.js does not allow users to use it outside the office app. What should I do? Please.
my-profile
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Visual Studio Mac Extensions: How to add an entry to the editor contextmenu?

I'm writing an extension for vs4mac and want to add an entry to the editor's contextmenu. Can anybody tell me what the extension point is? I tried the following in the Manifest.addin.xml: …
Ivo Krugers
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Cake Addins install fail error during build

I am using net 4.8 framework. and cake version 0.38.2. During build in Teamcity, it has to install addins cake.npm, cake.filehelpers. But following error happens Could not find any assemblies compatible with .NETFramework,Version=v4.6.1. Error:…
coder
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Build of Word-Add-In: error MSB3482: An error occurred while signing: Only certificates using RSA encryption are valid for signing ClickOnce manifests

When upgrading our solution from VS 2019 to VS 2022 and to .NET 4.8 on one of our machines the signing of a Word Add-In does not work any more. The machine was not in use for half a year so it could also be some other update stuff or so. The csproj…
rominator007
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What are the relative merits of developing Office 2007/2010 add-ins with and without VSTO?

Several years ago, I did some pretty serious Office add-in development for Office 2003 (Word, Excel and PowerPoint). I created some shared COM add-ins in C# using Visual Studio 2003. At the time, I looked at VSTO, but decided for reasons that I…
Gary McGill
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Microsoft Excel Add-In: Not working for versions earlier than 16.0.11629

This is the error message: Predictable Behavior 1100.4.4.6 O365 Perpetual – Legacy (Trident/IE11) Your offer is not working on Microsoft 365 versions earlier than 16.0.11629 on Windows 10. While clicking on the addin login page was not…
Yannick
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Can I use the AccessibleObjectFromWindow() function to retrieve the address of the interface for the Outlook window object?

I am trying to resolve one bug with AccessibleObjectFromWindow(). I am unable to retrieve ppvObject for Outlook, whereas it works well for MSWord. WindowPtr pdocWdw; HRESULT var = AccessibleObjectFromWindow( hControlWnd, DWORD(OBJID_NATIVEOM), …
pallavi korade
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Create an outlook calendar add-in

I am creating an outlook add-in following the official Microsoft Documentation: Build your first Outlook add-in I am using a MacBook Pro M1, so I am following the tutorial using Yeoman generation. Everything is working fine. I can see the add-in…
Giuseppe
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Is there an Rstudio shortcut key for ``?

I use it a lot on Rmarkdow for referring to code, so I created an Addin, but wanted to know if there's a shortcut. If it isn't the case, how could I do to configure the addin so when calling it, the position of the caret or cursor stands between…
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Add row-break to PowerPoint add-in

I've created a custom Powerpoint add-in (ppam) using the following code (from this tutorial https://www.rdpslides.com/pptfaq/FAQ00031_Create_an_ADD-IN_with_TOOLBARS_that_run_macros.htm): Sub Auto_Open() Dim oToolbar As CommandBar Dim oButton…
dsplnm
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What's best practice to track if user has made changes to an Enterprise Architect model in an EA add-in?

Desired behaviour: Once a user makes a change in the model, my EA add-in is supposed to flag the model as 'dirty'. This allows to conditionally export to another format on closing the file as in if dirty then do export. A change could be any kind of…
Benjamin4991
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Getting a handle to the "CC", "FROM" and "TO" windows in outlook

I am working on an outlook addin in which I need to get a handle to the "CC", "FROM" and "TO" windows in the reading pane. The approach that was taken in the addin is to use FindWindowEx WIN API and pass in the name as a parameter. But the problem…
Raam
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click once publish for office add in

in continuation with trying to create setup for excel add in using this, I am trying to use clickonce. When I publish, I get the following error: An error occurred generating a bootstrapper: Unable to begin updating resource for…
genericuser
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Office (esp. Outlook) addins

We want to develop addins for outlook, word and excel. As of now I am aware of 2 types of solutions. One to go for Shared Add-in (COM based) and other to build VSTO based Add-in. As I am new to this, which would be the better option? (Or if there is…
Jigar
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Challenges getting first Outlook Web Add-in to run

I am trying to get my first Outlook Web add-in to work. So I: Followed the instructions at https://learn.microsoft.com/en-us/office/dev/add-ins/tutorials/outlook-tutorial "Tutorial: Build a message compose Outlook add-in" Per those instructions, I…
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