Reading stdout from the Windows script host object

Posted on 2003-12-04
Medium Priority
Last Modified: 2010-05-01
Nothing is returning from the .read call ??
Any ideas on why this isn't working and what I should do to enable it??

Private Sub Command1_Click()

    Dim objwsh As New WshShell
    Dim sInput As String

    Set objWSHexec = objwsh.Exec("ipconfig")

    While Not objWSHexec.StdOut.AtEndOfStream
          sInput = sInput & objWSHexec.StdOut.Read(1)
         If InStr(sInput, "Press any key") <> 0 Then
            Exit Sub
         End If
End Sub
Question by:mccainz2
  • 2
LVL 26

Accepted Solution

EDDYKT earned 800 total points
ID: 9876382
Try this

Set objShell = WScript.CreateObject("WScript.Shell")
Set objExecObject = objShell.Exec("%comspec% /c ipconfig.exe")

Do Until objExecObject.StdOut.AtEndOfStream
    strLine = objExecObject.StdOut.ReadLine()
    strIP = Instr(strLine,"Address")
    If strIP <> 0 Then
        Wscript.Echo strLine
    End If

From http://www.microsoft.com/technet/treeview/default.asp?url=/technet/scriptcenter/scrguide/sas_wsh_pkoy.asp

Author Comment

ID: 9876500
Excellent Eddy! what is the purpose of comspec ????

Final code , only trivial modifications needed....

Private Sub Command2_Click()

    Dim Wscript As New WshShell
    Set objShell = New WshShell
    Set objExecObject = objShell.Exec("%comspec% /c ipconfig.exe")

    Do Until objExecObject.StdOut.AtEndOfStream
        strline = objExecObject.StdOut.ReadLine()
        Debug.Print strline
        strIP = InStr(strline, "Address")

End Sub
LVL 26

Expert Comment

ID: 9876665
In WindowNT or high %comspec% returns cmd.exe
In Win95 or higher %comspec% returns command.exe

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