题目：做一Win32程序，将当前目录下的文件A.txt的内容进行颠倒（第一个字和最后一个字交换，第二个字和倒数第二个交换，文件内容包括中英文，依此类推），然后另存为B.txt。

要求：使用Windows界面，程序中需应用按键或者菜单控件，并使用文件对话框。

-Topic: Does one Win32 process, the current directory under the document content A.txt reversed (the first word and the final exchange of a word, the second and penultimate word exchange, the contents of the documents, including Chinese and English, and so on ), and then Save As B.txt. Requirements: to use Windows interface, take the application process or the menu button controls, and use the file dialog.