ComboBox not up to date

Hi,

I've populated a combobox by iterating through a collection. The each
object is a user defined class and I've overwritten the ToString
accordingly.

My problem is that when i update objects within the collection
directly, I would expect the combo box to reflect these changes. The
'innerList' within the combobox is updated but i cannot get the drop
down list itself to reflect the updates.

I've tried the combo methods Refresh, Update and Invalidate but these
have no effect.

When a call 'GetItemText' the new value is returned but the old value
is still displayed to the user.

Thanks
Lee