vb屏幕打印程序 实现特定屏幕的拷贝及打印功能，用在打印曲线或第三方的程序上非常有用-vb screen printing process to achieve specific screen copy and print capabilities, using the Print curve or third parties on the process very useful

vb动态曲线查询，查询打印历史曲线，可以以各种方式显示曲线-vb dynamic curve queries, query print historical curve, the curve can be displayed in various ways