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Dos output to variable

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I need to get the output of a command that runs in a command prompt, the problem is that run only returns a 1 or 0. I tried

#RequireAdmin $Command="cmd /c dir c: /s";<-Your command 
RunWait($command & ">" & @scriptdir & "\output.txt","") 
$OutPut = FileRead( @scriptdir & "\output.txt",FileGetSize(@scriptdir & "\output.txt")) 
MsgBox(0, "", $OutPut)  
FileDelete( @scriptdir & "\output.txt")

however the output.txt is blank even tho there is output.

Edited by botanic

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Using StdoutRead is a lot easier than using a temp file.

#include <Constants.au3>
$Command=@comspec & " /c dir c:\ /s";<-Your command 

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