ISandboxSupport Interface to support TLF content in a sub-application.
 ColumnState The ColumnState class calculates the sizes and locations of columns using the width of the container and the container attributes.
 ContainerController The ContainerController class defines the relationship between a TextFlow object and a container.
 ScrollPolicy The ScrollPolicy class is an enumeration class that defines values for setting the horizontalScrollPolicy and verticalScrollPolicy properties of the ContainerController class, which defines a text flow container.
 TextContainerManager Manages text in a container.