- TToolbar is a container for tool buttons (TToolButton). it provides an easy way to arrange and manage visual controls.
-Typically, the tool buttons correspond to items in an application's menu and gives the user more direct access to the application's commands.
-- TControl - - is the main ancestor class for all visual controls.
-The definition includes a large number of constants, types and methods that are inherited by derived classes and types.
-These include devices for defining and controlling:
-Properties defined here can be overridden by descendant classes.
-- TPanel: A defined rectangular area of the form into which other components can be placed to group them functionally and geographically
-Most of the properties are defined in ancestor classes including TCustomPanel, TCustomControl and TWinControl -
-Any controls such as buttons or check boxes that are placed inside the panel become its children, and inherit many of its properties. If the Panel is moved, the child controls move with it. Any part of a child control that falls outside the panel becomes invisible.
-Form - the fundamental visual object that appears in every GUI application.
-Most of the properties are inherited from the ancestors
-- TMenuItem - An item of a TMainMenu or TPopupMenu. -
-