As much as I knew, you can't do that
You cant sort in the recordsource, because it's not there
You cant sort it in the sorting and grouping dialog box, again because it
not listed there.
You can sort only by records that in the record source of the report.
So what ever value you want to put in the unbound field, if it is a
calculated field, then put in the SQL, and then bound the field in the report
to that calculated field, and you will be able to sort it.
If you need help with the SQL, then tell us what you trying to do.
