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How to use the MSComm1 control of vb6 to send text messages to the mobile phone?

Semantically understood, MSComm1.CommPort should be the value of the serial port number (1, 2, 3, 4, etc.). This serial port number can be seen from the device manager

In addition, sending text messages through the COM port of this control requires corresponding hardware equipment (SMS mode), and it cannot be achieved by pure software