This list is a subset of the user widgets/classes that libGx implements:
GxDisplay
GxMainWin GxPopupWin GxRootTransient
GxLabel
GxButton
GxStateButton
GxArrowButton GxFilledArrowButton
GxEditWin
GxTextWin
GxMenuBar
GxPopupMenu
GxMenuOption GxMenuCheckOption GxMenuDivider GxSubMenu
GxHSlider GxVSlider
GxHScrollBar GxVScrollBar
GxHLine GxVLine (window dividers frequently used in dialogs)
GxButtonBar GxButtonBarItem
GxToolBar GxToolBarDock GxToolBarFloatingDock GxToolBarButton GxToolBarManager
GxTooltip (used by GxButtonBar's and GxToolbar's)
GxFrame
GxList
GxAutoScrolledWin GxAppScrolledWin
GxTabManager GxTabPane
GxRadioBox
GxNumberBox
GxCheckBox
GxStatusBar
GxPercentBar
GxFileSelector
GxMessageDialog
GxConfermDialog
GxYesNoDialog
LibGx implements the following geometry control classes. These classes are client side only, no information propagates to the server.
GxGhost
GxRow GxThinRow
GxColumn GxThinColumn
GxTable