这是一个文档，详细介绍了MFC combox各个函数的详细使用说明，各个参数的详细介绍，还有每个函数的使用案例，非常适合初学者-This is a document, introduced the use of MFC combox detailed descr iption of each function, details of the various parameters, and each function of the use case, very suitable for begin