VBScript rookie problems

Hello,

I've been using Dragon NaturallySpeaking for a number of years now, and I recently started experimenting with WSR and its macro capability. I've managed to make a few XML-based macros with the help of Brad's extremely helpful "User's Guide," and over the last few days I've been trying to learn how to use VBScript within macros. I picked up a beginner's VBScript programming book at the library, read the first 100 pages, and thought I'd try modifying the following DNS command to work as a VBScript macro with WSR. The command opens an Outlook 2007 attachment by its number. I didn't write the command; I got it from another speech recognition forum and modified it to work the way I want it to. Here's the VBA code:

Sub Main
    Dim Att As Attachment
    Dim msg As MailItem
    Dim attachmentname As String

    SendKeys "^o",1  'open the mail message

    Set msg = ActiveInspector.CurrentItem
    Set Att = msg.Attachments.Item(CInt(ListVar1))
    attachmentname = Environ$("TEMP") + "/" + Att.FileName
    Att.SaveAsFile(attachmentname)

    SendKeys "%{F4}" 'close the mail message

    ShellExecute attachmentname, 1, "", "Attachment"
    Set msg=Nothing
    Set Att=Nothing
End Sub

I rewrote the code as shown below. The first problem I encountered was that my attempts (now commented out) to instantiate the WScript.Shell object resulted in the error, "Object required: WScript." It seems like a really basic command like that ought to work on my Vista Business system. Is there something else I'm supposed to install on my computer before I attempt to write, run, and debug VBScripts?

So I commented out the two WScript.Shell lines and kept going. (I later found out that I can use Application.SendKeys instead of the WshShell object's SendKeys statement, so maybe I won't need to instantiate this object anyway.) The next error I got was for the "msg = objOutlook.ActiveInspector.CurrentItem" line, as follows:

 Object doesn't support this property or method: 'msg'

Again, this statement seems pretty straightforward. I get the feeling like there's something missing that out to have installed first before I started trying to write VBScripts. Any advice? Thanks.

-Russ

<command>
<listenFor>open attachment [AttachNum]</listenFor>
<script language="VBScript"> 
<![CDATA[
Dim Att, msg, attachmentname, objWshObject, objOutlook

    Set objOutlook = GetObject(, "Outlook.Application")
    'Set objWshObject = GetObject(, "WScript.Shell")
    'Set objWshObject = WScript.CreateObject("WScript.Shell")

    Application.SendKeys("{{CTRL}}o") 'open the mail message

    msg = objOutlook.ActiveInspector.CurrentItem
    Att = objOutlook.msg.Attachments.Item(CInt({[AttachNum]}))
    attachmentname = objWshObject.ExpandEnvironmentStrings("TEMP") & "/" & Att.FileName
    Application.Att.SaveAsFile(attachmentname)

    Application.SendKeys("{{ALT}}{F4}")  'close the mail message

    ShellExecute attachmentname, 1, "", "Attachment" 'need to find VBScript command equivalent
    msg=Nothing
    Att=Nothing
]]>
</script>
</command>
<numbers name="AttachNum" start="1" stop="9"/>