My goal is to use VSTO 2005 SE technology to create an Excel 2003 Add-In. The links and documentation I am finding states this is possible but all examples seem to be for creating Ribbons for Excel 2007. Does anyone have a link and/or sample code to get me pointed in the right direction. I am using VB.Net 2005. My solution must be an Add-In and not a document level solution which VSTO 2005 SE is suppose to allow me to do.