>I am still having difficulty understanding how valid and when works, but I put the code in valid as you recommended, and the control still don't refresh when type in a value and I locate the record (except my grid), only when I drop down the combobox window and select the Item. All of my controls are bound through controlsource, and my combobox is bound through rowsource with rowsourcetype = fields.

.When is similar to .GotFocus
.Valid is similar to .LostFocus

I agree with Marcia that you need to verify your controls are bound (it would be helpful to know what types of controls they are), but I disagree that the code shouldn't go in the interactive change. This would be useful if someone needs to just 'browse' items from the combo without the combo losing focus.