For help with general CEGUI usage: - Questions about the usage of CEGUI and its features, if not explained in the documentation. - Problems with the CMAKE configuration or problems occuring during the build process/compilation. - Errors or unexpected behaviour.
Have a look at the Tab_Order code snippet. The Taharez scheme does not have a visual cue for every selected widget. In that code I show one way of displaying a highlight. However the best solution would be to create a scheme that actually displays the selected widget, such as dotted lines around the text of the widget.