Hi,
This could be kind of involved depending on whether
you've ever played with VBA. But, this is how I'd do
it...
I'm imagining that you're probably pulling up something
like a customer order number via the combo box. I'd set
the recordsource of the combobox to a query something
like:
"SELECT CustomerOrderNumber FROM tblCustomerOrders ORDER
BY CustomerOrderNumber"
This will populate the combo box with the latest set of
CustomerOrder numbers in ascending order everytime you
open the form.
Now, if you're adding orders through the same form that
this combo box is on, you might need to add a short
snippet of VBA code somewhere in the process to force the
combobox to requery it's recordsource every time you add
a new record.
On the form properties, under events, look for the event
called AfterInsert. Click on the three dots and choose
Event Builder. This will take you to the VBA editor and
your cursor will be in a section of code that looks
something like
Private Sub Form_AfterInsert()