用VC++对计算机的串口进行编程，并作一个简单的串口查询通讯程序。用一条九针的DB-9串口通讯线将计算机的com1口和com2口相连，com1作为接受口，com2作为发送口。-With VC++ programming serial port of the computer, and for a simple query of the serial communication program. With a nine-pin DB-9 serial cable to the computer s communication port com1 and com2 port connected, com1 as the receiving port, com2 as the transmission port.