Combo Box Lost Focus event not firing

Hello,
I'm trying to get a little Excel VBA Ap (2007) running by Monday. I want to trap lost focus events in two combo boxes.

If there's a way to add an event via the user interface, I'm not seeing it.

I implemented the event handlers by double clicking the combo box from the form designer; it automatically generates the Change event handler; I then manually edit OnChange, changing it to LostFocus, e.g.

Private Sub cboGroup_Change() becomes cboGroup_LostFocus()

The event never fires.

I've tried finding answers online but have failed, and don't have time to order a reference book.

Could someone tell me what I'm doing wrong?

Thanks!

Comboboxes on a usereform don't have a LostFocus event.

Have you tried any of the other events?

Thanks for answering, Norie!

I considered OnChange, but that's not really appropriate as it fires as the user edits the combo box's text box. I need to trap when the user either selects an item from the drop down list, or has finished editing by tabbing out of the control. The contents of the second combo box depend on the selection in the first combo box. Do you know the appropriate event or events to use?

I also tried GotFocus and LostFocus but no luck there, either.

AH... I just found the user interface to select an event for the combo box, the one on the design view. It's possible I may resolve this after all...