TCustomOutline = class(TCustomGrid)
class PASCALIMPLEMENTATION TCustomOutline : public Vcl::Grids::TCustomGrid
TCustomOutline is the base class for controls that display outline nodes (TOutlineNode objects).
Use TCustomOutline as a base class when defining a control that displays outline nodes in a two-dimensional layout. TCustomOutline introduces the ability to manage a hierarchy of outline nodes, including the ability to control the appearance and layout of those nodes and to expand or collapse branches of the outline tree.
Do not create instances of TCustomOutline. To add an outline control to a form, use the TOutline object, which publishes many of the properties, events, and methods of TCustomOutline, or TTreeView, which wraps the Windows control that performs the same function.