对一个长字符串，比如说中间有几个逗号，当你输入逗号时，字符串会在逗号处分开并显示，简单的MFC编程，供初学者学习使用。-A long string, for example, the middle of several commas when you type a comma, the string in a comma-disposition to open and display a simple MFC programming for beginners to learn to use.