Is there a way of storing VBA source code that\'s common and accessible to all Microsoft Office products..? I have a variety of functions which I use in both Access and Excel, a
If you want to use VBA in the same Office program (e.g. one Excel file to another, or one Access file to another), you don't need to use any special kind of file. You can add a reference to an external database or worksheet with macro's enabled.
Navigate Tools - References - Browse - Excel/Access file - Add the file
See the following screenshot:
You can't use files across different Office applications this way, but you shouldn't. Each application has different built-in functions, so your code is likely incompatible anyway.