For a project we need to build some sort of mail merging with Word documents. I prefer this without Word automation. I recall that there is a way to create a .docx file (sort of template) for your letters that you can then just load with the packaging API and add a data file to (e.g. XML). The person who then opens that file will see the letter merged with that data.
Does anyone know if that method actually exist and how to do it?