Legacy Platform documentation
Extensions
Build SpreadsheetWeb Legacy Platform extensions, configure development projects, use extension APIs, and apply implementation patterns and tips.
Extensions add custom behavior to Legacy Platform applications and administrative workflows. These guides introduce the extension model, project setup, available APIs, implementation considerations, and practical techniques for developing and maintaining extension code.
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Extensions guides
Extension ReferenceThis page contains extension references in the form of methods and their explanations, for building an extension in a SpreadsheetWEB application.Extension SupportRelatively small changes to functionality of a SpreadsheetWeb Application, such iterative calculations, can be done through extension support.Extension Tips and TricksThis page contains tips and tricks, methods, and workarounds to common issues in extensions, and error handling methods with the use of examples.Getting Started: Building an ExtensionYou can download Visual Studio Template (C#) and start working on creating an extension right away or create your own project.