Here are the data structures with brief descriptions:

CArg	The Arg structure represents a string argument with a pointer to the string and its allocated length
CArgv	The Argv structure represents an argument vector, which is an array of Arg structures, along with the number of allocated elements in the array
CCCStr	Complex character objectl with a pointer to the complex character string and its allocated length
CChyron
CChyronKey
CColorPair
CDate
CField	Structure for form fields
CForm
CInit	Gathers runtime information for C-Menu Menu, Form, Pick, and View components, used for passing common data and state during initialization and processing of these componentsi
CLine	The Line strutures are attached to the Menu main structure
CMenu	The Menu structure is the main data structure for the menu application, containing all the information about the menu, its lines, and its display properties
CPick	Pick data structure
CRGB
CSIO	The SIO structure encapsulates various aspects of the terminal's state and configuration, including color management, file pointers, and terminal device information
CString	The String structure represents a string object with a pointer to the string and its allocated length
CText	Structure for form fields
CTime
CUiColor	Structure representing a color in the UI
CUiColorPair
CUiConfig	Structure representing the configuration options for the UI runtime
CUiEvent	Structure representing an input event in the UI
CUiFramedSurface
CUiRect	Structure representing a rectangular area in the UI
CUiRuntime	Opaque structure representing the UI runtime environment
CUiStyle	Structure representing the style attributes for UI elements
CUiSurface	Opaque structure representing a drawable surface in the UI
CUiTheme	UI theme definition
CView
CViewStack
CWCStr	Wide character string object with a pointer to the wide character string and its allocated length