很好界面编程，包括打印、打印预览的编程，是很好的标准的界面编程，很具参考价值-Valuable standard user interface programming reference that includes codes for friendly interface programming, printing, and printing preview programming.

打印条形码,条形码的运用越来越广泛,可以直接打印39,128等条形码,(To print bar code, the application of bar code is more and more widely, can be directly printed bar codes such as 39128,)