用VC++编写一个CDC文字处理程序的代码，通过本程序大家可掌握如何产生自定义字体和自定义插入符，熟悉对CString类的使用。讲解定时器的使用和DrawText函数的巧妙运用以及CDC的裁减功能。

-Using VC++ to write a word processing program code CDC, through this process we can learn how to produce a custom font and custom caret, familiar with the use of CString class. Explain the use of timers and clever use of DrawText function and the reduction of CDC function.