[dba-VB] combobox problems

Hello All:

I'm currently working on a Windows CE application  I am a little baffled at
the behavior of a bound combo box.

Setup:

I have a Combobox bound to a BindingSource, with the DisplayMember a name
and the DisplayValue an integer which is the PK of the underlying table.  I
want the user to select a name and then (later) I am going to add a new row
to a different table using the name's key value along with other key values
taken from other combo boxes.

Behaviour:
When a selection is made in the combobox, the new name selected shows up as
expected.  However when I look at the combobox.ValueSelected, it is the key
of the FIRST row, not the key of the currently displayed row.  When I look
at the BindingSource.Position, it is zero.

If I watch the combobox.SelectedIndexChanged event, it always fires twice.
The first time it fires, the ValueSelected contains the key value of the
newly selected item and the BindingSource.Position is zero.  The second time
it fires, the ValueSelected has reverted to the key of the first row, and
the BindingSource.Position is the position of the newly selected item.

It looks like I can grab the key value I need by saving it whenever the
SelectedIndexChanged event fires with a zero BindingSource.Position, but
that seems kind of kludgy, and I don't know if I can trust it.  Surely the
whole point of a bound combobox is to supply the value of the displayed
item.  Am I missing something here?

Thanks,
Doug Steele