50801. BNetworkAddress
50802. BNetworkInterface
50803. BNode
50804. BOARD_ITEM
50805. BOM
50806. BOP_Face
50807. BOP_Indexs
50808. BOX2I
50809. BObjectList
50810. BPackageRoster
50811. BPartition
50812. BPatch
50813. BPatch_Vector
50814. BPatch_function
50815. BPatch_image
50816. BPath
50817. BPoint
50818. BPopUpMenu
50819. BPose
50820. BPoseView
50821. BPositionIO
50822. BQuery
50823. BRect
50824. BReference
50825. BRegion
50826. BRepBuilderAPI_MakePolygon
50827. BRepBuilderAPI_MakeWire
50828. BRep_Builder
50829. BResources
50830. BRoster
50831. BRow
50832. BS
50833. BSDF
50834. BSOCK
50835. BSONArrayBuilder
50836. BSONElement
50837. BSONElementSet
50838. BSONField
50839. BSONList
50840. BSONObj
50841. BSONObjBuilder
50842. BSONObjIterator
50843. BSONObjSet
50844. BSONObjSetDefaultOrder
50845. BST
50846. BSTNode
50847. BSTree
50848. BScreen
50849. BScrollBar
50850. BScrollView
50851. BShape
50852. BSize
50853. BString
50854. BStringField
50855. BStringItem
50856. BStringList
50857. BStringVector
50858. BStringView
50859. BT
50860. BTC_PUBKEY
50861. BTREE
50862. BTab
50863. BTabView
50864. BTextControl
50865. BTextView
50866. BTranslatorRoster
50867. BTreeNode
50868. BVHNode
50869. BVRef
50870. BVariant
50871. BView
50872. BVolume
50873. BWTInterval
50874. BWindow
50875. BYTEARRAY
50876. BYTE_VECTOR
50877. BackCert
50878. Backend
50879. Background
50880. BackgroundCompileRequest
50881. BackgroundLayer
50882. BackgroundMusicsMap
50883. BackingStoreClient
50884. Backtrace
50885. BadGuy
50886. Bag
50887. BalanceFactor
50888. Ball
50889. BallSprite
50890. BamAlignment
50891. BamMultiReader
50892. BamReader
50893. BamWriter
50894. Bank
50895. BankAccount
50896. Bar
50897. BarGoLink
50898. BarLine
50899. Barrier
50900. BarrierSet