XLAM field Leave feedback On this page XLAM field See Also XLAM field The XML-based and macro-enabled Add-In format for Excel 2010 and Excel 2007. An Add-In is a supplemental program that is designed to run additional code. Supports the use of VBA projects and Excel 4.0 macro sheets (.xlm). See Also class FileType Was this page helpful? Not really Yes, thanks Any additional feedback you'd like to share with us? Skip Send Please tell us how we can improve this page. Skip Send Thank you for your feedback! We value your opinion. Your feedback will help us improve our documentation.