1) I download and bulid the AFWrapper dll to enable access to AF from VBA via COM. This worked.from Excel 2010.
2) I added one of my own methods. It worked at first but I became (too) ambitious and it decided to retaliate!
3) To enable me to develop and test entrely within Visual Studio I bulit a test project that call the AFWrapper dll (within the same solution). Just a few lines of code which build but when I run I get the message disp[alyed in the attached screen capture. This would appear to relate to ProcessBook yet nowhere do I reference ProcessBook.