Ok, i find, so i give you the code.
Thanks a lot :
Global $test = ""
_AD_Open()
Global $sOU = "OU=TEST,OU=RETEST,DC=domaine,DC=net"
Global $aResult = _AD_GetObjectsInOU($sOU, "(name=*)", 2,"sAMAccountName,distinguishedName,displayname")
For $i = 1 To $aResult[0][0]
$test = $test&$aResult[$i][0]
sleep (100)
Next
_AD_Close()
MsgBox (0,"",$test)