In this post I describe how to create Visio COM Add-ins with VS2005. It turns out that the add-ins created using the shared wizard I create have an issue such that they do not install correctly on machines that don’t have Visual Studio installed (i.e. likely all of your customers machines). There is a KB article describing how to deal with this problem and pointing at the relevant download here: http://support.microsoft.com/default.aspx?scid=kb;en-us;908002.