The Change event maps to the TextChanged event, but in the case of the ComboBox controls there are several differences between VB6 and VB.NET. The VB6 Change event fires only when the text in the edit area is modified, whereas the VB.NET TextChanged event also fires when a different item is selected in the list area, when the AddItem is called, or when the value of the current element is assigned programmatically via the List property.

For this reason, the TextChanged event handler generated by the Upgrade Wizard may fire at the wrong time and cause bogus results or runtime errors. This never happens with VB Migration Partner, which perfectly mimics the VB6 behavior.