Programming Microsoft Office 365 Apr 2026

Before coding, ensure you have the necessary tools installed and an active sandbox environment:

The toolkit will generate a project configured for Excel, Outlook, PowerPoint, and Word by default. 3. Build the User Interface (HTML/CSS) Programming Microsoft Office 365

: Located in src/taskpane/ , this file contains the markup for your feature's interface. You can add buttons, input fields, or status displays here. Before coding, ensure you have the necessary tools