Send SMS using AT command

Send SMS using GSM modem from your computer. This Example shows you to use AT command to handle the GSM modem.
Try this to send SMS using this example.

1- Insert a form in VB project
2- Insert textbox (txtMsg,txtDestinationNumber)
3- Insert command button (Command1)
4- Insert a MSComm1
5- Connect your mobile phone in computer with datacable

Private Sub Command1_Click()
End Sub

On Error GoTo Errr:
If MsgBox("Are you sure to send SMS Message", vbYesNo) = vbNo Then
    Exit Sub
End If
' Set up the communications port
MSComm1.CommPort = 5 ' Com Port 5
' Set for 9600 baud, no parity, 8 data, and 1 stop bit.
MSComm1.Settings = "9600,N,8,1"
MSComm1.InputLen = 0
MSComm1.PortOpen = True
MSComm1.Output = "AT" & Chr$(13)
' Set up the phone for a text message
MSComm1.Output = "AT+CMGF=1" & Chr$(13)
MSComm1.Output = "AT+CMGS= " & Chr(34) & txtDestinationNumber.Text & Chr(34) & Chr$(13) & Chr(10)
MSComm1.Output = txtMsg.Text & Chr$(26)
MSComm1.PortOpen = False
MsgBox "Message Sent successfully"
Exit Sub
MsgBox Err.Description & Err.Number, vbExclamation

End Sub