>Is there anyway I can programmatically set the combo control so that users cannot enter text into a combo field. I only want them to select the item, I dont want them to add to the list in the combo but more importantly at the moment the user is just typing in free text in the field rather than selecting from the list. How do I stop this?
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>Many Thanks

Use a listbox instead. Listbox+textbox=combobox, that's why it's called a combobox.