maybe
if form.isEdit() = FALSE then
    eventInfo.setErrorCode(some number, I always just use "1")
endIf

Not sure if it needs to be in the field or the list

Peter



On 08/01/2018 02:35 PM, Roger Phil wrote:
> Hi
> 
> Aging memory doesn't bide well in this field or perhaps I've never been 
> asked for this before.
> 
> Would anyone know if there is a means of preventing a mouseclick on the 
> dropdown arrow for list in a combo box ?
> 
> Why? The form does not enter edit until a pushbtton is pressed but the 
> arrow on a drop box still "drops down". Whilst it the list cannot 
> perform its desired action it seems some users select the item and then 
> exit the form thinking the selection is complete.
> 
> Hope that makes some sense.
> 
> No prizes, but thanks in advance