I'm using SciTE to write and test this script.
$iResult = RunWait(@ComSpec & ' /c "' & 'runtest.exe -i "'&$sVideo&'"', "c:\Test\Sample_Test\", @SW_SHOW, $STDERR_CHILD)
ProcessWaitClose($iResult)
Local $sOutput = StderrRead($iResult)
MsgBox(0, "Output", $sOutput)
UpdateLogFile("Output is ",&$sOutput)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
;This works fine on my test system:
#include <AutoItConstants.au3>