Design and Implement of SerialPort class on Upper machine System

Although MSComm control is widely used on upper machine in the network communication systems, it still has inadequacies, such as inconvenient to operate, not high in safety factor, poor sharing etc. This paper introduced the design and implement of Serial Port Class in a network upper machine system S under Ajax, proposed improvements of applications for MSComm control, constructed a shared example of the Serial Port Class, achieved to share port, and gain, analysis, store the data real time, and effectively solve the inadequacies of MSComm controls.