修改MFC的打印预览窗口的工具条按钮为图标按钮 ,Modifying the button of the toolbar in MFC printing preview window to the button with button

在MFC的文档/视图中虽然有很好的打印预览功能，但是工具栏很呆板，本例子可以很好的修改工具栏-At MFC' s document/view there is very good although the print preview function, but the toolbar is very stiff, this can be a very good example of changes Toolbar