With Excel-DNA you can make native (.xll) add-ins for Excel using C#, Visual Basic.NET or F#, providing high-performance user-defined functions (UDFs), custom ribbon interfaces and more. This project ...

Barcode Function Library Add-In for Excel. Contribute to EszopiCoder/excel-barcode-fx-library development by creating an account on GitHub.

The Draw tab is not on Excel's ribbon by default. Learn how to enable, add and use the Draw tab and the various drawing tools in Excel.

To fix an Excel spreadsheet not adding up correctly, check the SUM function's syntax and make sure there aren't any text format cells in the sheet.

Learn how to add a custom dictionary in Microsoft Word, Excel, and Outlook. Create and import a custom dictionary in any Office app.