I was searching how to get the Exit or Error value from a command launched with "Shell".

I found the article TechNet Blogs > Hey, Scripting Guy! Blog > How Can I Hide the Command Window When Executing a Command Like net Localgroup Administrators? that shows this is possible with WScript.Shell.Exec($Command)

I created this function

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; Script Options ;
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If Not @LOGONMODE
    Break On
Else
    Break Off
EndIf
Dim $RC
$RC = SetOption("Explicit", "On")
$RC = SetOption("NoMacrosInStrings", "On")
$RC = SetOption("NoVarsInStrings", "On")
If @SCRIPTEXE = "KIX32.EXE"
    $RC = SetOption("WrapAtEOL", "On")
EndIf
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; Declare variables ;
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Dim $Stdout
Dim $ReturnValue
Dim $Command

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; Initialize variables ;
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; Code ;
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$Command = ExpandEnvironmentVars('"%comspec%"') + ' /C Dir C:\'
$StdOut = WshShellExec($Command)
$ReturnValue = @ERROR

? 'Command:'
? $Command
? 'stdOut:'
? $stdOut
? 'Error:'
? $ReturnValue
?

$Command = ExpandEnvironmentVars('"%comspec%"') + ' /C Dir Q:\'
$StdOut = WshShellExec($Command)
$ReturnValue = @ERROR

? 'Command:'
? $Command
? 'stdOut:'
? $stdOut
? 'Error:'
? $ReturnValue
?

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; UDF Section ;
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; Personal UDF Section ;
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Function WshShellExec($Command)
    Dim $RC
    Dim $WshShell
    $WshShell = CreateObject('WScript.Shell')
    $RC = $WshShell.Exec($Command)
    While Not $RC.Status
        Sleep 1
    Loop
    $WshShellExec = $RC.StdOut.ReadAll
    Exit $RC.ExitCode        
EndFunction


Does anybody know how to include the value $RC.StdErr.ReadAll in the return value $WshShellExec?

I was thinking to return an array

$WshShellExec = Split($RC.StdOut.ReadAll + '|' + $RC.StdErr.ReadAll,'|')

But that does not work...