Unfortunately, grouping doesn't provide this functionality.  A common work
around is to group the controls either by using a common prefix for the name
or by using a special keyword in the tag property of each control that is a
member of the group. Using either of these methods you can then loop through
the controls
to do whatever you require.

Method 1
-------------------
dim ctl as control
for each ctl in me.controls
   if  left(ctl.name,9)="ctlGroupA" then
           'do something
   endif
next ctl
set ctl=nothing

Method 2
----------------
dim ctl as control
for each ctl in me.controls
   if ctl.tag="GroupA" then
       'do something
   endif
next ctl
set ctl=nothing

Method 3
--------------
This works if you name your controls with a common prefix and a number
(txtGroupA1, txtGroupA2 . . txtGroupA9)

dim i as integer
for i=1 to 9
   'do something to the  control
   debug.print i,   me.controls("txtGroupA" & i).value
next i

Method 4
--------------
Take a look at my website for some custom classes that provide methods for
working with groups of controls:
It's the ControlGroups sample on www.daiglenet.com/msaccess.htm