Some times we get customers using the combobox as a show / hide panel for other stuff. While this is some what clever solution, the combo is not really designed for that. An alternative would be to use the panelbar, yet it does not fit the purpose of the control I have in mind. Details panel (or what ever name we come up with) is a control that has a title, sort of like the panelbar and content area that's always custom. The details pane should allow for two modes: overlay and displace e.g. overlay acts as the way combobox acts now and displace acts in a similar fashion to the current panel bar. Apart from the aforementioned usage, another example will be the configuration panel in the QSF.