Develop Custom Add-ins for Office 2024

Add-in Express for Microsoft Office and .net is a comprehensive framework designed to simplify the development of custom Office solutions. It provides a unified platform for creating add-ins, smart tags, real-time data servers, and other extensions that integrate seamlessly with Microsoft Office applications. By handling much of the underlying complexity of COM (Component Object Model) and Office integration, it allows developers to focus on functionality and user experience rather than low-level infrastructure. The product supports multiple versions of Office and works across several .NET languages, making it a flexible choice for building robust, professional-grade Office tools.

The Add-in Express for Microsoft Office and .net 10.3 update now includes full support for Microsoft Office 2024, allowing developers to deliver solutions to the newest generation of Office applications. This update ensures that custom add-ins and other extensions built with the framework work reliably with Office 2024, while continuing to support earlier versions. By maintaining compatibility across releases, the framework helps developers keep their tools current and accessible to users adopting the latest Microsoft Office suite.

To see a full list of what's new in 10.3, see our release notes.

Add-in Express for Microsoft Office and .net is licensed per developer and is available as a Perpetual license with a 1 year subscription (minor and major updates and technical support). See our Add-in Express for Microsoft Office and .net licensing page for full details.

Learn more on our Add-in Express for Microsoft Office and .net product page.