I am having a problem convering some code from VB.Net to VB6

I have a Verfone terminal and a test project from Verifone that is written in .NET.  Most of it I can decipher but sending the string to the terminal has me stumped.
    Private WithEvents mobjRS232 As New System.IO.Ports.SerialPort is the definition of the item? that is used to send requests to the terminal in .NET.

I am not sure what is comparable in VB6 but I am trying to use an MSComm control and can't get it to work.

It appears that .NET is sending the information in binary.  How would I go about doing the same in VB6?

Thanks in advance for considering my question

JDL129

VB.net code
                 Dim abytSendData() As Byte
                Dim SQL As String
                SQL = strSendString
                ReDim abytSendData(strSendString.Length - 1)
                For i = 0 To strSendString.Length - 1
                    abytSendData(i) = Asc(strSendString.Substring(i, 1))
                Next
                Try
                    mobjRS232.Write(abytSendData, 0, abytSendData.Length)
                Catch ex As Exception
                    UpdateLog("Error Sending " & abytSendData.ToString, "")
                End Try
 
VB6 CODE
 
 
        If strSendString <> chr(ACK) Then
                strSendString = chr(STX) & strSendString & chr(ETX)
            strLRC = chr(ComputeLrc(strSendString))
                strSendString = strLRC & strSendString
        End If
 
                Dim abytSendData() As String
                Dim SQL As String
                SQL = strSendString
                ReDim abytSendData(Len(strSendString) - 1)
                For i = 1 To Len(strSendString) - 1
                    strString = Asc(Mid(strSendString, i, 1))
                    abytSendData(i) = Asc(Mid(strSendString, i, 1))
                Next
                    varSend = "abytSendData, 0,  Len(abytSendData)"
                    MSComm1.Output = strSendString

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