Windows                 A graphic window displayed in the GUI client
                        (for Windows only!)
guiInfo                 Get an info tip or a completion list about an
                        object
guiObjBrowse            Function to implement an object browser
guiRemove               Remove one or several objects (and prompt for
                        confirmation)
guiSave                 Save one or several objects to a .Rdata file
guiStart                Install/Uninstall and Start/Stop a GUI client
