>>But do that only if the .displayvalue is empty; if it's not, maybe some location related to the value would be better ("equal to" is also a relation :). I think it's possible for a user who drops the combo and has the mouse in the dropdown area to inadvertently select a value they didn't want - and your forcing of the selection to top may lead to a similar effect. YMMV.
>
>That's true, but if the bound data field is empty then DisplayValue is also empty by definition.
>
>The actual code in the combo DropDown event is this, so it only works if there is no value present. It leaves everything alone if the field has a value:
>

>IF NOT EMPTY(this.ControlSource)
>	IF EMPTY(EVALUATE(this.ControlSource))
>		KEYBOARD "{Home}" PLAIN CLEAR 
>	ENDIF
>ENDIF
>
>DODEFAULT()
>

OK, so you're already doing what I had in mind. Think alike etc.