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

[detail level 12]

Carg_type
CLastError	The last error happened during download
▼CQObject
CDlThreadObj
▼CQThread
CDlthread
CSoCDevice	Data struct for port mapping API
CSoCDevices	Data struct for port info for all the devices connected to host
Cthread_rectype
Cxfstkdldrapi