松下空调电总版子机测试程序，测试之前请选择串行端口，本程序使用命令按钮控件，关闭通信端口，结束系统；使用Output属性将用户欲发送的字符串送出；MSComm的OnComm事件程序，由CommEvent属性值的不同，将各别的程序代码写入，相关的子程序中，在此例中，只要RThresold中的设置字符数到达时，便会使得CommEvent属性值变成comEvReceive，因此接收的子程序便被执行。-Panasonic air conditioning electric sub-machine test procedures, test before, please select the serial port, this program using a command button control to close the communication port, the end of the system　Output property will send customers who wish to send the string　the MSComm OnComm event procedures.different CommEvent property values​ ​ , different program code is written, related subroutine, in this case, set the number of characters in the RThresold arrives, will be making CommEvent property value into comEvReceive therefore receive thesubroutine will be executed.