[Элементы GUI] Выделить всё и выпадающее меню

Case $Button_ALL
            Local $var, $count=0, $MaxCount = 12
            For $i = $Checkbox1 To $Checkbox12 Step 1
                $var = GUICtrlRead($i)
                If $var = 1 Then
                    For $i = $Checkbox1 To $Checkbox12 Step 1
                        GUICtrlSetState($i, $GUI_UNCHECKED)
                    Next
                ElseIf GUICtrlRead($var) = 4 Then
                    $count = $count + 1
                    If $Count = $MaxCount Then
                        For $i = $Checkbox1 To $Checkbox12 Step 1
                            GUICtrlSetState($i, $GUI_CHECKED)
                        Next
                    EndIf
                EndIf
            Next

$version=GUICtrlCreateCombo("Opera AC 3.7.8 RC2", 378, 50, 139, 21, BitOR($CBS_DROPDOWNLIST,$CBS_AUTOHSCROLL))