I need a way, using an ordinary ComboBox (not Drop-Down List), to discard any typed-in entries that don't match up with an item on the list.

For example, if someone types something in, then tabs out of the ComboBox, and whatever they typed in doesn't correspond to something already in the list, the ComboBox.Text will be reset to " " in the validation code.

I'm sure this can't be too difficult but my brain is too tired. Can anyone help me?