Karl,
I had in mind two colums in cbo1...
Injury SubInjury

AfterUpdate... is cbo1.Column(1) = Null then...

OnCurrent... is cbo1.Column(1) = Null then...

If I understand you correctly... seems as though a T/F in cbo1 would be
pretty much the same thing.
Mine is just one of many possible "flavors" of a solution.
--
hth
Al Campagna
Microsoft Access MVP 2007-2009
http://home.comcast.net/~cccsolutions/index.html

"Find a job that you love... and you'll never work a day in your life."


"KARL DEWEY" wrote in message
...
You'd also have to add the same determination code to the record's
OnCurrent event, so cboSubInjury would show/not show according to the
cboInjury value.
Why not have a field in combo1's source table to indicate sub or not -
Yes/No field.

--
Build a little, test a little.


"Al Campagna" wrote:

Joe,
If I understand correctly, you initially show just the first combo
(ex. cboInjury), and on the AfterUpdate of cboInjury, if the selected
value has an associated SubInjury choice/choices... then make make
cboSubInjury visible and updateable.
You'd also have to add the same determination code to the record's
OnCurrent event, so cboSubInjury would show/not show according to the
cboInjury value.
--
hth
Al Campagna
Microsoft Access MVP 2007-2009
http://home.comcast.net/~cccsolutions/index.html

"Find a job that you love... and you'll never work a day in your
life."


"Joe" wrote in message
...
I would like to set up a form containing a combo box with a list of
mechanisms of injury. Some mechanisms have sub groups that I would
like
to
have visible by means of linking them with a cascading combo box. Is it
possible to have only some records from Cbo 1 link to Cbo 2? The
examples
I
have seen to date show cascading data for all records in the first
combo
ie
the city/state or postcode/suburb examples where every record has a sub
record.

Thanks for your help.
--
Joe


.