MSComm32 and SComm32 have the same syntax and functionality
Syntax:-
value = SComm1.DSRHolding
value:-
A Boolean Expression indicating the current state of the DSR line.
Example:-
If SComm1.DSRHolding = True Then
MessageBox.Show("DSR is On")
Else
MessageBox.Show("DSR is Off")
End If
Remarks:
When connecting two devices, computers etc via their RS232 ports the DSR on one device is usually connected to the DTR on the other. When a remote device is powered up and ready to communicate it usually sets its DTR line ON which would be detected by the remote device as a change in the state of its DSR line.
