vb源程序 演示如何将数字及字符生成二维码图像并打印，并用于实例中。-vb source code demonstrates how to generate a two-dimensional code numbers and character images and print, and for instance.

打印机适配器端口直接编程通过系统并行口1,打印一行字符”HELLO”并行口1的数据口地址为378H,命令口地址为37AH()