说明：  Windows 窗体控件是可再次使用的组件，它们封装了用户界面功能，并且可以用于客户端 Windows 应用程序。“Windows 窗体”不仅提供了许多现成控件，还提供了自行开发控件的基础结构。可以组合现有控件、扩展现有控件或创作自己的自定义控件。Windows 窗体控件是从 System.Windows.Forms.Control 直接或间接派生的类。
(Windows Forms controls are reusable components that encapsulate user interface functionality, and can be used for client-side Windows applications. " Windows Forms" not only provides many ready-made controls, also provides a self-developed control infrastructure. Existing controls can be combined to expand the existing control or create your own custom controls. Windows Forms control is directly or indirectly derived from the System.Windows.Forms.Control class.)