vb的打印，调用打印函数，先测试打印机向串口发数据，将字符串转为十六进制表示的字符串，从接收缓冲区读取数据，关闭串口事件响应-vb print, call the print function, send the first test the printer to the serial data string to hexadecimal string from the receive buffer read data off the serial port incident response

vb2008数据打印源代码例程，较好的例程，复制即可用-vb2008 data printing source code routines, good routines, copy to use

接收串口打印机的指令和数据，源代码中包括了大部分指令的编程方法-Serial printer instruction and data