#include <GuiConstants.au3>
    #include <GuiEdit.au3>
    #include <GuiListView.au3>
    #include <WindowsConstants.au3>
    #include <EditConstants.au3>
    #include <WinAPI.au3>

    Opt("GuiCloseOnESC", 0)

    Global $hEdit, $hDC, $hBrush, $Item = -1, $SubItem = 0

    Global $Style = BitOR($WS_CHILD, $WS_VISIBLE, $ES_AUTOHSCROLL, $ES_LEFT)

    $hGUI = GUICreate("ListView Subitems edit in place", 300, 200)

    $hListView = _GUICtrlListView_Create($hGUI, "Items|SubItems| Col 3 | Col 4", 2, 2, 296, 196, BitOR($LVS_EDITLABELS, $LVS_REPORT))
    _GUICtrlListView_SetExtendedListViewStyle($hListView, $LVS_EX_GRIDLINES)

    For $i = 1 To 10
        _GUICtrlListView_AddItem($hListView, "Item " & $i)

        _GUICtrlListView_AddSubItem($hListView, $i - 1, "SubItem " & $i, 1)

    Next

    GUIRegisterMsg($WM_NOTIFY, "WM_NOTIFY")
    GUIRegisterMsg($WM_COMMAND, "WM_COMMAND")

GUISetState()

    Do
    Until GUIGetMsg() = $GUI_EVENT_CLOSE

    Func WM_NOTIFY($hWnd, $iMsg, $iwParam, $ilParam)
        Local $tNMHDR, $hWndFrom, $iCode

        $tNMHDR = DllStructCreate($tagNMHDR, $ilParam)
        $hWndFrom = DllStructGetData($tNMHDR, "hWndFrom")
        $iCode = DllStructGetData($tNMHDR, "Code")

        Switch $hWndFrom
            Case $hListView
                Switch $iCode
                    Case $NM_DBLCLK
                        Local $aHit = _GUICtrlListView_SubItemHitTest($hListView)

                        If ($aHit[0] <> -1) And ($aHit[1] = 0) Then
                            $Item = $aHit[0]
                            $SubItem = 0
                            Local $aRect = _GUICtrlListView_GetItemRect($hListView, $Item)
                        ElseIf ($aHit[0] <> -1) And ($aHit[1] > 0) Then
                            $Item = $aHit[0]
                            $SubItem = $aHit[1]
                            Local $aRect = _GUICtrlListView_GetSubItemRect($hListView, $Item, $SubItem)
                        Else
                            Return $GUI_RUNDEFMSG
                        EndIf

                        Local $iItemText = _GUICtrlListView_GetItemText($hListView, $Item, $SubItem)
                        Local $iLen = _GUICtrlListView_GetStringWidth($hListView, $iItemText)
                        $hEdit = _GUICtrlEdit_Create($hGUI, $iItemText, $aRect[0] + 3, $aRect[1], $iLen + 10, 17, $Style)

                        _GUICtrlEdit_SetSel($hEdit, 0, -1)
                        _WinAPI_SetFocus($hEdit)
                        $hDC = _WinAPI_GetWindowDC($hEdit)
                        $hBrush = _WinAPI_CreateSolidBrush(0x0000FF)
                        FrameRect($hDC, 0, 0, $iLen + 10 , 17, $hBrush)
                EndSwitch
        EndSwitch
        Return $GUI_RUNDEFMSG
    EndFunc

    Func FrameRect($hDC, $nLeft, $nTop, $nRight, $nBottom, $hBrush)
        Local $stRect = DllStructCreate("int;int;int;int")

        DllStructSetData($stRect, 1, $nLeft)
        DllStructSetData($stRect, 2, $nTop)
        DllStructSetData($stRect, 3, $nRight)
        DllStructSetData($stRect, 4, $nBottom)

        DllCall("user32.dll", "int", "FrameRect", "hwnd", $hDC, "ptr", DllStructGetPtr($stRect), "hwnd", $hBrush)
    EndFunc

    Func WM_COMMAND($hWnd, $Msg, $wParam, $lParam)
        Local $iCode = BitShift($wParam, 16)

        Switch $lParam
            Case $hEdit
                Switch $iCode
                    Case $EN_KILLFOCUS
                        Local $iText = _GUICtrlEdit_GetText($hEdit)
                        _GUICtrlListView_SetItemText($hListView, $Item, $iText, $SubItem)
                        _WinAPI_DeleteObject($hBrush)
                        _WinAPI_ReleaseDC($hEdit, $hDC)
                        _WinAPI_DestroyWindow($hEdit)

                        $Item = -1
                        $SubItem = 0
                EndSwitch
        EndSwitch

        Return $GUI_RUNDEFMSG
    EndFunc