Oct 30, 2025 · Use VSTO add-ins to automate Microsoft Office applications, extend features of the application, and customize the application's user interface.

Apr 9, 2025 · Wondering whether to use Office Add-ins or VSTO Add-ins? This 2025 developer guide compares features, pros, cons, and use cases to help you choose the right add-in architecture for …

Feb 20, 2025 · Learn how to install VSTO Excel add-ins with our step-by-step guide. Boost your spreadsheets’ capabilities and troubleshoot common installation issues easily.

VSTO is Microsoft .NET technology and add-ins using JavaScript API technology use JavaScript, HTML and CSS. JavaScript API add-ins are highly portable across platforms like iOS, mobile phones, …

Dec 11, 2024 · Our team specializes in migrating existing VSTO and VBA add-ins to modern, web-based Office Add-ins and Office Scripts. We have successfully completed migrations for various …

You can use VSTO Add-ins to automate Microsoft Office applications, extend features of the application, and customize the user interface (UI) of the application.

On this page you will find an example of creating Add-ins for Microsoft Excel in VSTO 2008. You can find this sample project in the Demo Projects folder of the Add-in Express install folder.

In this article we will give you a basic example of Excel VSTO add-in demonstrating how to display a WinForms form containing a grid control: We will use our WinForms grid control, iGrid.NET, in this …

Mar 13, 2024 · VSTO web extensions are created with Visual Studio and are mainly focused on expanding what you can do with Microsoft Office programs like Word, Excel, Outlook, PowerPoint, …

Mar 13, 2024 · VSTO Add-ins are Windows-focused and allow deep interaction with desktop Office applications. They’re best suited for enterprise scenarios that require advanced customization, offline …