checkitem_lítview

#include <GUIConstantsEx.au3>
#include <WindowsConstants.au3>
#include <ListviewConstants.au3>
#include <guilistview.au3>

GUICreate("listview items", 300, 200, -1, -1)

$listview = GUICtrlCreateListView("col1        |col2       |col3 ", 10, 10, 200, 150)
$button = GUICtrlCreateButton("Start", 75, 170, 70, 20)
GUICtrlCreateListViewItem("item1|col22|", $listview)
GUICtrlCreateListViewItem("item2|col12|col13", $listview)
GUICtrlCreateListViewItem("item3|c3332|", $listview)
 GUICtrlCreateListViewItem("item4|44444|col33", $listview)
 GUICtrlCreateListViewItem("item5|5555|col33", $listview)
GUISetState()

While 1
    Switch GUIGetMsg()
        Case -3
            Exit
        Case $button
            _Start()
    EndSwitch
WEnd

Func _Start()
;~  _GUICtrlListView_SetItemSelected($listview, 0)
    $dataitem = GUICtrlRead(GUICtrlRead($listview))
    $GetColItem = StringSplit($dataitem, "|")
    If $GetColItem[3] = "" Then; kiểm tra dữ liệu cột 3
        ;Đén đây thì bó tay. Vậy mong Pro trợ giúp, xin trân thành cảm ơn.
        ;Làm sao để kiêm tra cột 3 khi có dữ liệu trống thì nó sẽ chuyển sang item tiếp theo
    Else
        MsgBox(0,"", GUICtrlRead(GUICtrlRead($listview)))
    EndIf

EndFunc