TCustomTrack = class(TPresentedControl, IValueRange)
class PASCALIMPLEMENTATION TCustomTrack : public Fmx::Controls::Presentation::TPresentedControl
Base class for all track bar components.
TCustomTrack is the base class for all track bar components such as TTrackBar.
If you need to create your own custom track bar, then you should derive your component from TCustomTrack, as it already implements functionality for drawing and manipulating the track bar.