Prevent combobox dropdown

The first component on my form is a ComboBox, when the form is in edit/add mode then that combobox has the focus (as it is the first control) and it drops down to show the valuelist. This is acceptable for new records, but when editing an existing record this is annoying.
Is there a way to prevent this combobox from showing the valuelist as soon as the user goes to edit mode?

I know I could set the focus to another field without a valuelist, but that is not desired.

see UICONSTANTS (under application) → Combobox_show_popup_on_focus_gain

thx that is what i was looking for