>Is there any way to not show the arrow for the dropdown on a combobox (say when you want it to be readonly) and make it visible again (say when it is editable)?
No AFAIK,
But you could use a opaque container and show it/hide it when you want to hide the arrow.
Against Stupidity the Gods themselves Contend in Vain - Johann Christoph Friedrich von Schiller
The only thing normal about database guys is their tables.