A buttonCombo in Ribbon is enterable without checking the input.
A standard Combobox select the the input (delete the text and typ ie. d shows all entries start with d) and I can controll that input a none existing entries in selection is not allowed.
In a buttonCombo you can type everything without a preselection and the controll to refuse unknown input.
Is this a error or a missing feature.
Perhaps I can use a html dropdown object instead a buttonCombo but can find if this is possible.