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

CTGeoMCBranchArrayContainer	Storing and re-using geometry states of the TGeoManager in use by storing them as TGeoBranchArrays
CTGeoMCGeometry	Implementation of the TVirtualMCGeometry interface for building TGeo geometry
CTMCManager	Singleton manager class for handling and steering a run with multiple TVirtualMC engines sharing events
CTMCManagerStack	Concrete implementation of particles stack used by the TMCManager
CTMCParticleStatus
CTMCRootManager	The Root IO manager for VMC examples for both sequential and multi-threaded applications
CTMCTemplateAutoLock
CTMCVerbose	Class for printing a detailed information from MC application
CTVirtualMC	Abstract Monte Carlo interface
CTVirtualMCApplication	Interface to a user Monte Carlo application
CTVirtualMCGeometry	Interface to Monte Carlo geometry construction
CTVirtualMCSensitiveDetector	Interface to a user defined sensitive detector
CTVirtualMCStack	Interface to a user defined particles stack