MFC中常用类，宏，函数介绍，和GUI有关的各种对象，在窗口中输出文字，使用点，刷子，笔进行绘图，使用各种映射方式-MFC commonly used classes, macros, functions, introduction, and GUI on a variety of objects, the output text in the window, point of use, brush, pen drawing, using a variety of mapping methods