对话框是Windows应用程序中最重要的用户界面元素之一，是与用户交互的重要手段，在程 序运行过程中，对话框可用于扑捉用户的输入信息或数据。对话框是一个特殊类型的窗口，任何对窗口进行的操作（如：移动、最大化、最小化等）都可在对话框中 实施，一般来说，在对话框中通过各种控件（如：按钮、编辑框、列表框、组合框等）来和用户进行交互。控件是在系统内部定义的用于和用户交互的基本单元。-Windows Application dialog box is the most important element of the user interface is an important means of interacting with the user, the program is running, the dialog box can be used to capture user input information or data. Dialog box is a special type of window, any window operations (such as: mobile, maximize, minimize, etc.) can be implemented in the dialog box, in general, through a variety of controls in the dialog box (such as: buttons, edit boxes, list boxes, combo boxes, etc.) and user interaction. Internal control is defined in the system used and the basic unit of user interaction.