Shiva,
You said you are new to MS Access and vba, so I'd like to know why you need this codified string. I'm not saying you do not, what I am asking is the business rationale. Quite often I see newcomers to Access with a preconceived solution of how to do something. Quite often there are underlying database concepts that make their "solution" more of a kludge than database approach. Again, I am not saying that is what you are doing or thinking, I'd just like to hear the requirement rather than a solution to something that hasn't been described in business terms.
And ,as Doc suggested (powers to be) it wouldn't be the first time I've heard a "boss identify the solution" with no knowledge of database, Access, vba nor technical skills.
Good luck with your project.