TestDlg

代码说明：

说明：  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）。(How to write dialog box user interface program, how to associate data members with dialog box control and its implementation mechanism, how to use dialog box class member function to send messages to control and get class pointer of dialog box control, how to directly use dialog box control class to manipulate dialog box control (sending messages and calling member functions directly) Number).)