The add-in workbook itself is invisible, though it has one and often more hidden worksheets, where information related to the add-in may be stored. An add-in usually has some user interface elements, such as dialogs (UserForms), buttons on the ribbon, or buttons on context (right-click) menus, so you can access its features.
An Add-In is basically a workbook containing some code, that has some other unique properties. Excel Add-InsĪ lot of Excel procedures are packaged in Add-Ins. Written by Ron de Bruin, Microsoft Excel MVP.
