Add-ins compatibility

[cocker]

I was wondering if anyone could tell me whether or not (custom) add-ins created in Excel 2003 are/will be compatible with Excel 2010.

These add-ins are programmatically launched form an excel workbook. Don't know if that info helps you, are not, with your response.

Thanks

[romperstomper]

Depends what they do. If they provide UDFs, those functions will not be able to reference cells outside of those available in 2003.

[royUK]

What do you mean by they are launched from a workbook? Addins are available to any open Excel Workbook