用VB编写，控制计算机的打印口，利用打印口驱动温度传感器DS18B20，实现数字式测温。体积小，使用方便。-Prepared to use VB to control the computer s print port, the use of print port driver temperature sensor DS18B20, the realization of digital temperature measurement. Small size and easy to use.

一个实现高速公路收费站票据打印样稿的程序，可以利用串口、并口打印机进行测试-To achieve a highway toll station ticket printing comp program, we can use serial, parallel port printer to test

实现了打开串口，对串口进行读写，并且向打印机发送字符！-Open the serial realized on the serial read and write, and send to the printer character!

实现串口调试，可实现打印中打印点、线功能-Serial debugging print in print point line function