Here are the classes, structs, unions and interfaces with brief descriptions:

CBackgroundBox	A decorative background box
CButton	A simple button with a defined size and text
CCustomButton	A button that can be set to a custom image
CDividingLine	A decorative dividing line
CDropDown	An expandable dropdown list of buttons
CFrame	A decorative dividing line
CGraph	A scrollable graph of data. Data and time steps must be manualy updated
CGuiElement
CClickEvent
CRightClickEvent
CGuiElementHandler
CelementNode	The linked list node containing one GuiElement. This system will probably be changed in the future
CJMeventDispatcher
CEvent
CJMwindow
CListMenu
CItemSelectedEvent
CItemDeselectedEvent
CMessage	Displays text in a larger font
CMultiSwitch	A multi position switch. Displayed as a horizontal list of selections
CSwitchedEvent
CRenderEnvironment
CSlider	A movable slider used to select a number within a defined range
CInputEvent
CSliderBox	Contains a slider and text box. Changing one updates the other
CInputEvent
CTabbedMenu
CTextBox	A text input box
CTextInputEvent
CFloatInputEvent
CToggleSwitch	A simple toggle swich. Can be turned on or off
CTurnedOnEvent
CTurnedOffEvent