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

CAlignedDimensionNode
CAngularDimensionNode
CAnimation
CAnyCAD
CAObject
CApplication
CArrayBuffer
CArrayBufferView
CArrowWidget
CAxisAlignedBox
CAxisWidget
CAxWidget
CBackground
CBasicMaterial
CBatchedBufferShape
CBooleanTool
CBrepIO
CBrepSceneNode
CBufferAttribute
CBufferGeometry
CBufferGeometryList
CBufferShape
CBufferShapeBase
CCamera
CClassId
CClipPlaneView
CCollisionDetector
CColorBackground
CColorLookupTable
CColorMapKeyword
CCommand
CCommandListener
CCommandManager
CCompoundShape
CCoordinateGridWidget
CCoordinateWidget
CCraftPathFeature
CCurveShapeProperty
CDbView
CDerivativeValues
CDerivativeValues2d
CDimensionNode
CDocument
CDocumentEvent
CDocumentEventArgs
CDocumentIO
CDocumentListener
CDocumentSceneNode
CDoubleList
CDrawableElement
CDrawableInstance
CEdgeExplor
CEdgeVertex
CEditMode
CEditor
CEditorEvent
CEditorListener
CElement
CElementAttribute
CElementId
CElementIdList
CElementIdSet
CElementIterator
CElementSchema
CElementSchemaIterator
CElementSchemaManager
CElementTable
CEnumAttributeComponents
CEnumAttributeSemantic
CEnumBlendEquation
CEnumBlendFactor
CEnumBlendingMode
CEnumBufferBit
CEnumBufferDataUsage
CEnumBufferType
CEnumCollisionState
CEnumCommandType
CEnumConvertParameterisationType
CEnumCraftPathMethod
CEnumCurvatureType
CEnumCurveType
CEnumDataType
CEnumDepthFunction
CEnumDepthPacking
CEnumDHComputeMethod
CEnumDimensionArrowStyle
CEnumEditorCode
CEnumEncoding
CEnumEnvBlendingMode
CEnumFaceSide
CEnumFramebufferAttachment
CEnumFramebufferTarget
CEnumGeomFillTrihedron
CEnumGeomJoinType
CEnumKeyCode
CEnumKeyModifier
CEnumMapping
CEnumMouseButton
CEnumNormalMapType
CEnumPointStyle
CEnumPositionType
CEnumPrimitiveType
CEnumProjectionType
CEnumRobotJointType
CEnumShadowMapType
CEnumShapeFilter
CEnumStandardView
CEnumSurfaceBuildAlgorithm
CEnumSurfaceType
CEnumSweepTransitionMode
CEnumSystemColorMap
CEnumTextureFilterType
CEnumTextureFormat
CEnumTextureInternalFormat
CEnumTextureTarget
CEnumTextureUnit
CEnumTextureWrappingType
CEnumToneMapping
CEnumTopoOrientation
CEnumTopoShapeType
CEnumUpdateFlags
CEnumVertexAttributeLayout
CEnumViewCoordinateType
CEnumXdeShapeType
CExtremaCurveCurve
CExtremaCurveSurface
CExtremaPointCurve
CExtremaPointSurface
CExtremaShapeShape
CExtremaSurfacePoint
CExtremaSurfacePointPair
CExtremaSurfaceSurface
CFaceIntersector
CFeatureElement
CFeatureTool
CFileImage
CFloat32Array
CFloat32Buffer
CFloat32TypedArray
CFloat32TypedBuffer
CFloatList
CFontManager
CFontMaterial
CGAx1
CGAx2
CGAx22d
CGAx2d
CGAx3
CGBBox
CGBezierCurve
CGBSplineCurve
CGCirc
CGCirc2d
CGCone
CGCylinder
CGDir
CGDir2d
CGDirList
CGElips
CGElips2d
CGeneralSceneNode
CGeometryBuilder
CGEulerSequence
CGfxObject
CGHypr
CGHypr2d
CGLin
CGLin2d
CGMat
CGMat2d
CGP
CGParab
CGParab2d
CGPln
CGPnt
CGPnt2d
CGPnt2dList
CGPntList
CGPntList2
CGQuaternion
CGroupDrawable
CGroupElement
CGroupSceneNode
CGSphere
CGTorus
CGTrsf
CGTrsf2d
CGTrsfForm
CGuiRenderer
CGVec
CGVec2d
CGVec2dList
CGVecList
CGXY
CGXYList
CGXYZ
CHatchHatcher
CHoleDetector
CHoleEdgeIndex
CHoleEdgeIndexList
CHoleExplor
CHoleExplorLegacy
CIgesIO
CImage
CImageBackground
CImageList
CImageTexture2D
CImageTextureCube
CInputEvent
CInt32Buffer
CInt32List
CInt32TypedBuffer
CIntersectPoint
CIpcChannel
CIpcServer
CLinearDimensionNode
CLineCoordinateWidget
CLineDashedMaterial
CMaterialAnimationClip
CMaterialElement
CMaterialInstance
CMaterialManager
CMaterialTemplate
CMatplot
CMatrix3
CMatrix4
CMatrix4DecomposeResult
CMatrixAnimationClip
CMeasureDistanceNode
CMemoryImage
CMeshMaterial
CMeshNormalMaterial
CMeshPhongMaterial
CMeshStandardMaterial
CModelingEngine
CMoveAnimationClip
CMultiTouchEvent
CNodeCollisionDetector
CNormalCalculator
CPaletteWidget
CParameterBool
CParameterCast
CParameterCreator
CParameterDict
CParameterDouble
CParameterDoubleList
CParameterElementId
CParameterFloat
CParameterFloatList
CParameterGAx1
CParameterGAx2
CParameterGAx3
CParameterGDir
CParameterGPnt
CParameterGPntList
CParameterGVec
CParameterInt32
CParameterInt32List
CParameterIterator
CParameterString
CParameterValue
CParametricCurve
CParametricCurve2d
CParametricGeometry
CParametricSurface
CParticleSceneNode
CPath
CPickCaster
CPickedItem
CPickedItemIterator
CPickedItemSet
CPickedResult
CPickListener
CPlanarGridWidget
CPlane
CPlaneBoundedVolume
CPlaneCutFeature
CPlaneList
CPlotCurveFunctor
CPlotRange
CPlotSurfaceFunctor
CPointCloud
CPointCloudComparer
CPointElement
CPointsMaterial
CPrimitiveSceneNode
CPrimitiveShape
CPrimitiveShapeList
CPrincipalProps
CProjCurveResult
CProjectionTool
CProjSurfaceResult
Cqualifier
CQuaternion
CRadiusDimensionNode
CRawBuffer
CRawShader
CRay
CRaycaster
CRayIntersect
CRenderingEngine
CRenderSettings
CRigidAnimation
CRigidAnimationClip
CRobotAnimation
CRobotAnimationClip
CRobotArm
CRobotBody
CRobotDH
CRobotJoint
CRobotLink
CRotateAnimationClip
CScene
CScene2D
CSceneIO
CSceneManager
CSceneNode
CSceneNode2D
CSceneNodeIterator
CSceneNodeList
CSceneReader
CScreenShot
CSegmentsSceneNode
CSelectionManager
CShaderTemplate
CShaderTemplateManager
CShapeAnalysisTool
CShapeBuilder
CShapeElement
CShapeExplor
CShapeInstance
CShapeIntersector
CShapeIO
CShapeSceneNode
CShapeUpgradeTool
CSharedPointCloud
CSharedShapeNode
CSketch2dBuilder
CSketchBuilder
CSkyboxBackground
CSolidExplor
CSphere
CSpriteMaterial
CStepIO
CStlIO
CSTLReader
CStringList
CStringMap
CStringWList
CSurfaceAnalysisTool
CSurfaceBuilder
CSurfaceCurvature
CSurfaceShapeProperty
CSWIGTYPE_p_std__setT_unsigned_int_t__iterator
CTagDimensionNode
CTagNode2D
CTempViewContext
CTextSceneNode
CTexture
CTexture2D
CTextureCube
CTextureDesc
CTopoExplor
CTopoShape
CTopoShapeList
CTopoShapeProperty
CTransformTool
CUint16Array
CUint16Buffer
CUint16List
CUint16TypedArray
CUint16TypedBuffer
CUint32Array
CUint32Buffer
CUint32List
CUint32Set
CUint32TypedArray
CUint32TypedBuffer
CUint8Buffer
CUint8List
CUint8TypedBuffer
CUndoTransaction
CUniform
CUniformSet
CUserElement
CValueRange
CVec3List
CVector2
CVector2i
CVector3
CVector4
CViewContext
CViewer
CViewPosition
CVisualElement
CVisualInstance
CWireExplor
CXdeDocument
CXdeLabelSequence
CXdeNode
CXdeNodeIterator