>The application I'm working on uses the logic of having the first entry (default) in the RowSource as a space so that the user can select this if they choose an incorrect entry. For example, if the user inadvertently picked an option, without the blank available they would only be able to choose another option. This doesn't seem like a good interface to me. Is there a way for the user to easily revert the CombeBos to an empty value without having the blank in the list? Thanks!
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>Regards, Renoir

The system i'm working on at the moment has this functionality built in (Inherited from a 2.x system).
All the comboboxes have a Spinner and some have an X next to them, so the user can blank the combo if required.

we have created a couple of containers with all the required stuff and just drag n drop them as required.

HTH