一个使用ActiveX实现的串口通讯测试程序，有一定的实用性。-use ActiveX to achieve a serial communications test procedure, a certain degree of practicality.

此程式为DOS下的串口的通信测试程式，通过中断方式来接收数据并打印出来。可带数在DOS下测试，附源程序和测试程式。-Under this program for the DOS serial communications test program, through an interrupt to receive data and print them out. Can be tested with a number of the DOS, with a source and test progr