How to $WS_OVERLAPPEDWINDOW with inside GUICtrlListView proportionally?

#include <File.au3>
#include <Array.au3>
#include <GuiListView.au3>
#include <EditConstants.au3>
#include <GUIConstantsEx.au3>
#include <ButtonConstants.au3>
#include <WindowsConstants.au3>
Local $clipArray
Local $clipOpenFile = FileOpenDialog("Copy Tool", @DesktopDir & "\", "Format(*.txt; *.au3; *.htm; *.php; *.html; *.js)", 1)
If Not @error Then
    $flag1 = True
    $clipForm = GUICreate("Copy Tool", 364, 468, -1, -1, BitOR($WS_POPUP, $WS_BORDER, $WS_CLIPSIBLINGS, $WS_OVERLAPPEDWINDOW))
    WinSetOnTop("Copy Tool", "", 1)
    $EnterKey = GUICtrlCreateCheckbox("", 4, 0, 15, 20)
    $LEnterKey = GUICtrlCreateLabel("Send Enter", 20, 4, 70, 20)
    $clipList = _GUICtrlListView_Create($clipForm, "", 0, 20, 364, 448)
    $ClickItem = _GUICtrlListView_InsertColumn($clipList, 0, "Click to paste on text field..", 550)
    _GUICtrlListView_SetExtendedListViewStyle($clipList, BitOR($LVS_EX_GRIDLINES, $LVS_EX_FULLROWSELECT))
    _FileReadToArray($clipOpenFile, $clipArray)

    For $I = 1 To UBound($clipArray) - 1
        _GUICtrlListView_AddItem($clipList, $clipArray[$I], 0)
    Next

    GUICtrlSetState($EnterKey, $GUI_CHECKED)
    GUISetBkColor(0x333333, $clipForm)
    GUICtrlSetColor($LEnterKey, 0xFFFFFF)
    GUISetState(@SW_SHOW)
EndIf

If $clipOpenFile <> '' Then
    While 1
        Switch GUIGetMsg()
            Case $GUI_EVENT_CLOSE
                Exit

            Case $GUI_EVENT_PRIMARYDOWN
                $ci = GUIGetCursorInfo()
                If IsArray($ci) Then
                    If $ci[4] = $ClickItem Then
                        $getItemTxt = _GUICtrlListView_GetItemTextString($clipList)
                        If $getItemTxt <> '' Then
                            If GUICtrlRead($EnterKey) == $GUI_CHECKED Then
                                ClipPut($getItemTxt & @CRLF)
                            Else
                                ClipPut($getItemTxt)
                            EndIf
                            Send("!{TAB}")
                            Sleep(100)
                            Send("^v")
                        EndIf
                    EndIf
                EndIf

        EndSwitch
    WEnd
EndIf