ListView Checkbox State

#include <GUIConstantsEx.au3>
#include <WindowsConstants.au3>
#include <ListViewConstants.au3>
#include <GuiListView.au3>

Global $SelALL[1], $Flag = True

Example()

Func Example()
 Local $listview, $button, $item1, $item2, $item3, $item4, $item5, $item6, $msg
 GUICreate("listview items", 220, 250, -1, -1)
 $iListView = GUICtrlCreateListView("1111111|222222222|33333333", 10, 10, 200, 150, -1, BitOR($WS_EX_CLIENTEDGE, $LVS_EX_CHECKBOXES))
 $hListView = GUICtrlGetHandle($iListView)
 $SelALL[0] = GUICtrlCreateListViewItem("ALL", $iListView)
 $item2 = GUICtrlCreateListViewItem("item1|col12|col13", $iListView)
 $item3 = GUICtrlCreateListViewItem("item3|col32|col33", $iListView)
 $item4 = GUICtrlCreateListViewItem("item3|col32|col33", $iListView)
 $item5 = GUICtrlCreateListViewItem("item3|col32|col33", $iListView)
 $item6 = GUICtrlCreateListViewItem("item3|col32|col33", $iListView)
 $item7 = GUICtrlCreateListViewItem("item3|col32|col33", $iListView)

 _GUICtrlListView_SetCheckedStates($hListView, 1) ; select all

 GUISetState()

 While 1
  $nMsg = GUIGetMsg()
  Switch $nMsg
   Case $GUI_EVENT_CLOSE
    Exit
  EndSwitch
  If _GUICtrlListView_GetItemChecked($iListView, $SelALL) And $Flag = True Then
   _GUICtrlListView_SetCheckedStates($hListView, 1)
   $Flag = False
  ElseIf Not _GUICtrlListView_GetItemChecked($iListView, $SelALL) And $Flag = False Then
   _GUICtrlListView_SetCheckedStates($hListView, 0)
   $Flag = True
  EndIf
 WEnd
EndFunc   ;==>Example

Func _GUICtrlListView_SetCheckedStates($hListView, $iType) ; autoitscript.com/w/index.php?title=Snippets_(_Checkboxes_)
 Local $fState = False, $iCount = _GUICtrlListView_GetItemCount($hListView)
 If $iType < 0 Or $iType > 2 Then
  Return SetError(1, 0, 0)
 EndIf
 If $iType Then
  $fState = True
 EndIf
 For $i = 0 To $iCount - 1
  If $iType = 2 Then
   $fState = Not _GUICtrlListView_GetItemChecked($hListView, $i) ; Invert checked state with $iType 2.
  EndIf
  _GUICtrlListView_SetItemChecked($hListView, $i, $fState)
 Next
EndFunc   ;==>_GUICtrlListView_SetCheckedStates