AX 2012 workflow placeholder method


I am developing an AX 2012 workflow and I would need to add some numbers into the “submit” workflow text. Aka. the text that is shown when the user first clicks submit on a workflow (the introductory text), needs to have some numbers that are generated through X++ code, not DB fields. How can I achieve that?

Also does anyone know of any good white-papers on AX 2012 workflows?

Thanks, Karl