>I was surprised as I was working on a project the other day. I had a field that is required under certain conditions. To take care of this I placed a bit of code in the Valid method of the combobox that is bound to this field and didn't give it a second thought. As I was testing my changes, however, I was surprised to find that the valid method was not being fired unless the user changes the field. I was under the impression that the Valid method always fires right before a control looses focus. Well, apparently not. At least not for comboboxes.

If you want to take action based on the user selection in the combobox, you can use the Click() event.