代码用很简洁的语句表达出工具栏的具体运用方法,很适合初学者.-Code using a very simple statement expressing the concrete application of the toolbar method, it is suitable for beginners.

代码只是示意,只能Compile,Link不能成功,因为有些函数没有实现(Code simply motioned, can only Compile, Link cannot be successful, because some function is not implemented)