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

在屏幕上量出实际尺寸的工具,制作发票套打程序时用于对齐位置很有用-Basing revenue plans on spending at the actual size of the screen on the instrument, producing invoices套打program very useful for alignment position