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

CCable	Represents a cable with specific attributes and devices connected to it
CDevice	Represents a device within the Junction Diagram Automation Suite
CDrawContext
CDrawReactor	A document reactor that triggers drawing logic when a new AutoCAD document is activated
CIOList	Parses and manages IO and cable data from an Excel file
CJBox	Represents a junction box containing multiple cables
CJBoxApp	The main application class for the Junction Box Automation tool
CJBoxBuilderDialog	A dialog for selecting an IOList file and configuring a junction box
CNewDocumentContext	Contains context information needed to create a new AutoCAD document from a template