Windows Forms class hierarchy)

The.. NET Framework. windows. the Forms namespace provides all the classes used to form a Windows Forms-based application. the inheritance level is passed. NET Windows Forms provides many common features and provides many attributes and methods consistent with those of forms. some classes are explained as follows.
Control
The Control class is the basic class of other controls. It provides the basic functions of controls, such as the size, visibility, and tab order.
ScrollableControl
The ScrollableControl class directly inherits from the Control class and provides automatic scrolling capabilities for all controls that require a scroll bar.
ContainerControl
The ContainerControl class directly inherits from the ScrollableControl class and adds the flag and focus management functions to place other controls.
Form
The Form class directly inherits from the ContainerControl class and describes all the windows displayed in the application. the attributes and methods provided by the Form class allow you to display different forms, including the dialog box and multi-document interface (MDI) forms. all Windows Forms are derived from this class because it provides the basic functions required by forms.
UserControl
The UserControl class also inherits directly from the ContainerControl class and provides empty controls so that you can use Windows Forms Designer to create your own controls.