;; results:
;;###############
Window handle OK
Window object OK

Window:
-------
$sName  = xxx
$iRole  = 0x00000012
$sRole  = dialog
$iState = 0x00100000
$sState = focusable
$x, $y, $w, $h = 739, 339, 442, 402

Children:
---------
Window  = 0x000F05E2

$sName  =
$iRole  = 0x00000009
$sRole  = window
$iState = 0x00100000
$sState = focusable
$x, $y, $w, $h = 739, 339, 442, 402

    Window  = 0x001708A6

    $sName  = System
    $iRole  = 0x00000002
    $sRole  = menu bar
    $iState = 0x00008000
    $sState = invisible

    $sName  =
    $iRole  = 0x00000001
    $sRole  = title bar
    $iState = 0x00008000
    $sState = invisible

        Window  = 0x001708A6

        $iChildElem = 1
        $sName  =

        $iChildElem = 2
        $sName  =

        $iChildElem = 3
        $sName  =

        $iChildElem = 4
        $sName  =

        $iChildElem = 5
        $sName  =

    $sName  = Application
    $iRole  = 0x00000002
    $sRole  = menu bar
    $iState = 0x00008000
    $sState = invisible

    $sName  =
    $iRole  = 0x0000000A
    $sRole  = client
    $iState = 0x00100000
    $sState = focusable
    $x, $y, $w, $h = 739, 339, 442, 402

        Window  = 0x001708A6

        $sName  =
        $iRole  = 0x00000009
        $sRole  = window
        $iState = 0x00100000
        $sState = focusable
        $x, $y, $w, $h = 739, 339, 442, 402

            Window  = 0x009D0448

            $sName  = System
            $iRole  = 0x00000002
            $sRole  = menu bar
            $iState = 0x00008000
            $sState = invisible

            $sName  =
            $iRole  = 0x00000001
            $sRole  = title bar
            $iState = 0x00008000
            $sState = invisible

                Window  = 0x009D0448

                $iChildElem = 1
                $sName  =

                $iChildElem = 2
                $sName  =

                $iChildElem = 3
                $sName  =

                $iChildElem = 4
                $sName  =

                $iChildElem = 5
                $sName  =

            $sName  = Application
            $iRole  = 0x00000002
            $sRole  = menu bar
            $iState = 0x00008000
            $sState = invisible

            $sName  =
            $iRole  = 0x0000000A
            $sRole  = client
            $iState = 0x00100000
            $sState = focusable
            $x, $y, $w, $h = 739, 339, 442, 402

                Window  = 0x009D0448

                $sName  = file://C:\Program Files (x86)\xxxx\xxx Client\www\1600\html\update.html?_=1449862098
                $iRole  = 0x0000000A
                $sRole  = client
                $iState = 0x00100000
                $sState = focusable
                $x, $y, $w, $h = 739, 339, 442, 402

                    Window  = 0x001B0894

                    $sName  =
                    $iRole  = 0x00000010
                    $sRole  = pane
                    $iState = 0x00000040
                    $sState = read only
                    $sValue = file://C:\Program Files (x86)\xxx\xxx Client\www\1600\html\update.html?_=1449862098
                    $x, $y, $w, $h = 739, 339, 442, 402

                        Window  = 0x001B0894

                        $iChildElem = 1
                        $sName  =

                        $iChildElem = 2
                        $sName  =

                        $iChildElem = 3
                        $sName  =

                        $sName  =
                        $iRole  = 0x00000021
                        $sRole  = list
                        $iState = 0x00000000
                        $sState = normal
                        $sValue =
                        $x, $y, $w, $h = 754, 531, 412, 16

                            Window  = 0x001B0894

                            $sName  = Downloading file:
                            $iRole  = 0x00000022
                            $sRole  = list item
                            $iState = 0x00008000
                            $sState = invisible
                            $sValue =
                            $x, $y, $w, $h = 754, 412, 1, 1

                                Window  = 0x001B0894

                                $iChildElem = 1
                                $sName  =

                            $sName  = Time elapsed: 0:00:25
                            $iRole  = 0x00000022
                            $sRole  = list item
                            $iState = 0x00000000
                            $sState = normal
                            $sValue =
                            $x, $y, $w, $h = 774, 531, 392, 16

                                Window  = 0x001B0894

                                $iChildElem = 1
                                $sName  =

                                $iChildElem = 2
                                $sName  =

                        $sName  = proxy_settings
                        $iRole  = 0x0000001E
                        $sRole  = link
                        $iState = 0x00400000
                        $sState = linked
                        $sValue = file:///C:/Program%20Files%20(x86)/xxx/xxx%20Client/www/1600/html/update.html?_=1449862098#
                        $x, $y, $w, $h = 754, 545, 351, 15

                            Window  = 0x001B0894

                            $iChildElem = 1
                            $sName  =

                        $iChildElem = 6
                        $sName  =

                        $iChildElem = 7
                        $sName  =

                        $iChildElem = 8
                        $sName  =

                        $iChildElem = 9
                        $sName  =

                        $sName  = Help
                        $iRole  = 0x0000001E
                        $sRole  = link
                        $iState = 0x00400000
                        $sState = linked
                        $sValue = file:///C:/Program%20Files%20(x86)xxx/xxxx%20Client/www/1600/html/update.html?_=1449862098#
                        $x, $y, $w, $h = 1116, 339, 20, 34

                        $sName  = Minimize
                        $iRole  = 0x0000001E
                        $sRole  = link
                        $iState = 0x00400000
                        $sState = linked
                        $sValue = file:///C:/Program%20Files%20(x86)/xxx/xxx%20Client/www/1600/html/update.html?_=1449862098#
                        $x, $y, $w, $h = 1136, 339, 20, 34
;; I think this is it the button###################################################################################################
                        $sName  = Close
                        $iRole  = 0x0000001E
                        $sRole  = link
                        $iState = 0x00400000
                        $sState = linked
                        $sValue = file:///C:/Program%20Files%20(x86)/xxx/xxx%20Client/www/1600/html/update.html?_=1449862098#
                        $x, $y, $w, $h = 1156, 339, 20, 34
;;#################################
            $sName  = Vertical
            $iRole  = 0x00000003
            $sRole  = scroll bar
            $iState = 0x00008000
            $sState = invisible
            $sValue = 0

                Window  = 0x009D0448

                $iChildElem = 1
                $sName  =

                $iChildElem = 2
                $sName  =

                $iChildElem = 3
                $sName  =

                $iChildElem = 4
                $sName  =

                $iChildElem = 5
                $sName  =

            $sName  = Horizontal
            $iRole  = 0x00000003
            $sRole  = scroll bar
            $iState = 0x00008000
            $sState = invisible
            $sValue = 0

                Window  = 0x009D0448

                $iChildElem = 1
                $sName  =

                $iChildElem = 2
                $sName  =

                $iChildElem = 3
                $sName  =

                $iChildElem = 4
                $sName  =

                $iChildElem = 5
                $sName  =

            $sName  =
            $iRole  = 0x00000004
            $sRole  = grip
            $iState = 0x00008001
            $sState = invisible

    $sName  = Vertical
    $iRole  = 0x00000003
    $sRole  = scroll bar
    $iState = 0x00008000
    $sState = invisible
    $sValue = 0

        Window  = 0x001708A6

        $iChildElem = 1
        $sName  =

        $iChildElem = 2
        $sName  =

        $iChildElem = 3
        $sName  =

        $iChildElem = 4
        $sName  =

        $iChildElem = 5
        $sName  =

    $sName  = Horizontal
    $iRole  = 0x00000003
    $sRole  = scroll bar
    $iState = 0x00008000
    $sState = invisible
    $sValue = 0

        Window  = 0x001708A6

        $iChildElem = 1
        $sName  =

        $iChildElem = 2
        $sName  =

        $iChildElem = 3
        $sName  =

        $iChildElem = 4
        $sName  =

        $iChildElem = 5
        $sName  =

    $sName  =
    $iRole  = 0x00000004
    $sRole  = grip
    $iState = 0x00008001
    $sState = invisible

;;############################# code, very minor changes made in libraries to get variables ok

#include "ith-CUIAutomation2.au3"
#include "ith-MSAccessibility.au3"

Opt( "MustDeclareVars", 1 )

Example()


Func Example()

  Local $hWindow = WinGetHandle( "xxx" )

  If Not $hWindow Then Return ConsoleWrite( "Window handle ERR" & @CRLF )
  ConsoleWrite( "Window handle OK" & @CRLF )

  ; Get Window object
  Local $pWindow, $oWindow
  AccessibleObjectFromWindow( $hWindow, $OBJID_CLIENT, $tIID_IAccessible, $pWindow )
  $oWindow = ObjCreateInterface( $pWindow, $sIID_IAccessible, $dtagIAccessible )
  If Not IsObj( $oWindow ) Then Return ConsoleWrite( "Window object ERR" & @CRLF )
  ConsoleWrite( "Window object OK" & @CRLF )

  ; Window name
  Local $sName
  ConsoleWrite( @CRLF & "Window:" )
  ConsoleWrite( @CRLF & "-------" & @CRLF )
  PrintElementInfo( $oWindow, $CHILDID_SELF, "" )

  ; Get children
  ConsoleWrite( "Children:" & @CRLF )
  ConsoleWrite( "---------" & @CRLF )
  WalkTreeWithAccessibleChildren( $pWindow, 0 )

EndFunc


Func WalkTreeWithAccessibleChildren( $pAcc, $iLevel, $iLevels = 0 )

  If $iLevels And $iLevel = $iLevels Then Return

  ; Create object
  Local $oAcc = ObjCreateInterface( $pAcc, $sIID_IAccessible, $dtagIAccessible )
  If Not IsObj( $oAcc ) Then Return
  $oAcc.AddRef()

  Local $iChildCount, $iReturnCount, $tVarChildren

  ; Get children
  If $oAcc.get_accChildCount( $iChildCount ) Or Not $iChildCount Then Return
  If AccessibleChildren( $pAcc, 0, $iChildCount, $tVarChildren, $iReturnCount ) Then Return

  ; Indentation
  Local $sIndent = ""
  For $i = 0 To $iLevel - 1
    $sIndent &= "    "
  Next

  Local $hWnd
  WindowFromAccessibleObject( $pAcc, $hWnd )
  ConsoleWrite( $sIndent & "Window  = " & $hWnd & @CRLF & @CRLF )

  Local $vt, $pChildObj, $oChildObj, $iChildElem

  ; For each child
  For $i = 1 To $iReturnCount

    ; $tVarChildren is an array of VARIANTs with information about the children
    $vt = BitAND( DllStructGetData( $tVarChildren, $i, 1 ), 0xFFFF )

    If $vt = $VT_DISPATCH Then

      ; Child object
      $pChildObj = DllStructGetData( $tVarChildren, $i, 3 )
      $oChildObj = ObjCreateInterface( $pChildObj, $sIID_IAccessible, $dtagIAccessible )
      If IsObj( $oChildObj ) Then
        PrintElementInfo( $oChildObj, $CHILDID_SELF, $sIndent )
        WalkTreeWithAccessibleChildren( $pChildObj, $iLevel + 1, $iLevels )
      EndIf

    Else ; $vt = $VT_I4

      ; Child element
      $iChildElem = DllStructGetData( $tVarChildren, $i, 3 )
      PrintElementInfo( $oAcc, $iChildElem, $sIndent )

    EndIf

  Next

EndFunc