Re: Selecting item from Combobox Editor in DevExpress
to do what you want you have to develop your own extensions to support third party controls in this case. (you will need to use one of the various extensibilities for .Net, Java,… or the the native sdk (to request through HP)).
i know about an add-in for QTP for devexpress components using QTP SDK extension which provides object recognition. The extension is currently supporting these controls (its continuously developing further controls within the library):