[AccessD] Is it possible to update VBA code with VBA?

All,

We have an Access application that creates a number of reports and is
used by several people.  In addition, because the application is fairly
new, it is being enhanced on a regular basis.

In order to avoid confusion, we have decided to establish a simple
"Application Version ID" that is shown at the bottom of all reports (and
also on forms).  The format of this Version ID is
Day.Month/Day/Year at Hour:Minute (example Thu.1/13/2011 at 15:53).  This
works nicely when we want to see which version of the application was
used to generate a previously generated report, etc.

Currently, we have a simple routine which generates our Version ID.
When changes are made to the application by our programmer, this routine
is used to generate a new Version ID and display it in a TextBox.  We
then manually copy this generated ID into the value of a Global Constant
field which is referenced in several places in the application.  (Note
that only the Access programmer is allowed to change the application.)


This process works Okay, but it would be better if we could
programmatically update the value of the constant field when the
application is changed by the programmer.  

Is there a way to update VBA code with VBA?  In other words, can a VBA
routine update other VBA code? (A small routine to generate our Version
ID and then plug the generated ID into the value of a Global constant).

Here is our Global Constant Field with its value. 
Global Const Con_Version_ID As String = "Thu.1/13/2011 at 15:53"

This might be a really dumb question.  We just have never tried to do
this before.

Thanks for your help.
Brad