>You have Combobox.controlSource='Integer Field/Property/Variable' ?
Yes. It is a property.

>You have Initialize Combobox.Value='Integer value' ?
Yes. It does fine when I say Thisform.AddProperty('myproperty',0). The problem only appears later when it picks a different value from rowsource.

I gave up and went with the This.Value = INT(This.Value) in interactivechange. But it is puzzling.

Thanks for your help.