对话框用户界面程序的编写，如何向对话框控件关联数据成员及其实现机理，如何利用对话框类的成员函数向控件发送消息和获取对话框控件的类指针，如何直接利用对话框控件类操纵对话框控件（发送消息和直接调用成员函数）。如何在程序运行时产生和销毁控件。对话框控件的几种操作方式的优劣比较分析。如何实现对话框的部分收缩和展开。如何让对话框上的文本框在程序启动后立即获得焦点，如何利用SetWindowLong改变窗口的回调函数，通过改变文本框的默认回车处理方式进行演示。实现多个输入文本框间通过回车逐一向下传递焦点的另一种巧妙方法（用缺省按钮来处理）。-User interface dialog box of the preparation process, dialog box controls how the associated data to the members of the implementation mechanism of how to use dialog class member functions to send messages and access control dialog box controls the category indicators, how to directly use the type of manipulation of the dialog box controls Control dialog box (to send a direct message and call the member functions). How to have a run-time process control and destruction. Dialog box controls the operation of several comparative analysis of the merits and demerits. How to achieve some of the dialog box and start shrinking. Dialog box on how to make the text box immediately after the proceedings was the focus of how to use SetWindowLong to change window s callback function, by changing the default text box to enter demo mode treatment. Implementation among multiple input text box enter one by one down pass through the focus of another ingenious ways (to deal with the default button).