VBScript WScript error

I originally had this code as a Sub within another VBScript and it functioned correctly.

But now I need it as a standalone script at get this runtime error:
Object doesn't support this property or method: WScript.Arguments

So I have left something out to be able to correctly receive the command line arguments.  Can anyone please point out my error(s)?

''Sub SendIt(ByVal msgType, ByVal strSubject, ByVal strMessage)

Dim myShell
Dim myProcEnv
Set myShell = CreateObject("WScript.Shell")
 
Dim msgType     :               WScript.Arguments(0)
Dim strSubject  :               WScript.Arguments(1)
Dim strMessage  :               WScript.Arguments(2)
    Dim jm  : jm=False
               
               
    If (ucase(GetXMLText("Email\Enabled"))="TRUE") and GetXMLText("Email\SMTP")<> "" Then
        SetXMLText "Email\Enabled" , "True"
        jm=True
    Else
        SetXMLText "Email\Enabled" , "False"
        jm=False
        'Exit Sub
                                Response.End
    End If
 
    Dim Recipients : Recipients=0
        on error resume next
 
    Dim xmlDoc      ' Main XML document
    Set xmlDoc = GLOBAL_GetXMLDoc
 
    Dim mainNode    ' Main XML document
 
    Recipients = xmlDoc.getElementsByTagName("Email").item(0).getElementsByTagName("Recipient").Length
 
    If Recipients = 0 Then
        On Error Goto 0
        'Exit Sub
         Response.End
    End If
 
Dim fullMessage : fullMessage = ""
    fullMessage = fullMessage & GetXMLText("Email\EmailPrefix") & vbCrlf & vbCrlf
 
    Dim sType
    Select Case ucase(msgType)
        Case "SUCCESS"      : fullMessage = fullMessage & GetXMLText("Email\EmailSuccessMessage")  : sType = "Success"
        Case "FAILURE"      : fullMessage = fullMessage & GetXMLText("Email\EmailFailureMessage")  : sType = "Failure"
        Case "STATUS"       : fullMessage = fullMessage & GetXMLText("Email\EmailStatusMessage")   : sType = "Status"
        Case Else           : fullMessage = fullMessage & "<Invalid Message Type>"
    End Select
 
    fullMessage = fullMessage & vbCrlf & vbCrlf & strMessage & vbCrlf & vbCrlf
 
    fullMessage = fullMessage & GetXMLText("Defaults\EmailSuffix") & vbCrlf & vbCrlf
 
    Dim jmail
 
    If jm Then
         Set jmail = CreateObject("JMail.Message")
         jmail.silent=true
         jmail.logging=true
 
         jmail.from         = xmlDoc.getElementsByTagName("Email").item(0).getElementsByTagName("From").item(rCtr).getattribute("Address")
         jmail.fromname     = xmlDoc.getElementsByTagName("Email").item(0).getElementsByTagName("From").item(rCtr).getattribute("name")
    End If
 
' for each email address in MAIN DEFAULTS
' for each email address in EMAIL.RECIPIENT
    Dim rCtr : rCtr=0
    Do While rCtr < Recipients
        If xmlDoc.getElementsByTagName("Email").item(0).getElementsByTagName("Recipient").item(rCtr).getattribute(sType)="True" Then
            If jm Then     jmail.AddRecipient xmlDoc.getElementsByTagName("Email").item(0).getElementsByTagName("Recipient").item(rCtr).getattribute("Address")
        End If
        rCtr = rCtr + 1
    Loop
 
    If jm Then
        jmail.subject      = strSubject
        jmail.body         = fullMessage
        If objFSO.FileExists(replog) then
            jmail.AddAttachment  replog
        End If
        jmail.send( GetXMLText("Email\SMTP") )
    End If
 
' Clean up...
    Set jmail=Nothing
'''End Sub

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