每日一学，该工程描述的是CString 类的各种用法，CString是一个很强大的类，自带了很多操作函数，该工程有几种常用的函数，希望能帮到初学者-A study, the project is described in various categories CString usage, CString is a very powerful class, with many functions, the project has several functions, I hope to help