This inheritance list is sorted roughly, but not completely, alphabetically:

[detail level 123]

C_IWGuestControlCP	C++, events via Connection Point
▼CIDispatch
C_IWGuestX	internal, combines all methods under one dispatch
▼CIWGuestEventParam	C++
CWGuestEventParam	Parameter for some events, to override default processing
▼CIWGuestFont	C++
CWGuestFont	WGuestControl.ChatFont
CIWGuestNfmOptions	C++
▼CIWGuestRcArea	C++
CWGuestRcArea	WGuestControl.RcArea
CIWGuestShortcut	C++
▼CIWGuestSkinSupport	C++
CWGuestSkinSupport	WGuestControl.Skins
▼CIUnknown
C_IWGuestTraceEvents	C++, debugging
▼CIWGuestCore	C++
CWGuestX	Creatable: placed on the web page to represent connection progress, RC view etc. (single mode)