[Элементы GUI] Как реализовать разделительную полосу в Listbox?

#include <GUIConstantsEx.au3>
#include <WindowsConstants.au3>
#include <GUIListBox.au3>
#include <WinAPI.au3>

Global Const $ODT_LISTBOX = 2
Global Const $ODA_DRAWENTIRE = 0x1
Global Const $ODA_SELECT = 0x2
Global Const $ODA_FOCUS = 0x4
Global Const $ODS_SELECTED = 0x1
Global Const $ODS_NOACCEL = 0x100
Global Const $ODS_NOFOCUSRECT = 0x200

Global $iLB_LastSelIndx = -1
Global $sSep_RegExp = '^(—+) .*? \1$'


$hGUI = GUICreate("ListBox Separator Demo", 300, 200)

GUIRegisterMsg($WM_COMMAND, "WM_COMMAND")
GUIRegisterMsg($WM_MEASUREITEM, "WM_MEASUREITEM")
GUIRegisterMsg($WM_DRAWITEM, "WM_DRAWITEM")

$iListBox = GUICtrlCreateList("", 10, 10, 280, 180, BitOR($LBS_HASSTRINGS, $LBS_OWNERDRAWFIXED, $WS_VSCROLL))
$hListBox = GUICtrlGetHandle($iListBox)

For $i = 1 To 10
	If Mod($i, 3) = 0 Then
		_GUICtrlListBox_AddString($iListBox, "———————————————— Separator" & -Mod($i, 4) + 4 & " ————————————————")
	EndIf
	
	_GUICtrlListBox_AddString($iListBox, "String " & $i)
Next

GUISetState()

While 1
	$nMsg = GUIGetMsg()

	Switch $nMsg
		Case $GUI_EVENT_CLOSE
			Exit
	EndSwitch
WEnd

Func WM_COMMAND($hWnd, $iMsg, $iwParam, $ilParam)
	Local $hWndFrom, $iIDFrom, $iCode, $tNMHDR, $hWndList
	$hWndListBox = $hListBox
	If Not IsHWnd($hListBox) Then $hWndListBox = GUICtrlGetHandle($hListBox)
	
    $hWndFrom = $ilParam
    $iIDFrom = BitAND($iwParam, 0xFFFF); Low Word
    $iCode = BitShift($iwParam, 16); Hi Word
	
	Switch $hWndFrom
		Case $hWndListBox
			Switch $iCode
				Case $LBN_SELCHANGE ;, $LBN_DBLCLK
					Local $iIndex = _GUICtrlListBox_GetCurSel($hListBox)
					Local $sText = _GUICtrlListBox_GetText($hListBox, $iIndex)
					
					If StringRegExp($sText, $sSep_RegExp) Then
						_GUICtrlListBox_SetCurSel($hListBox, $iLB_LastSelIndx)
					Else
						$iLB_LastSelIndx = $iIndex
					EndIf
			EndSwitch
	EndSwitch
	
	Return $GUI_RUNDEFMSG
EndFunc

Func WM_MEASUREITEM($hWnd, $Msg, $wParam, $lParam)
	Local $CtlType, $tagMEASUREITEMSTRUCT = "UINT CtlType;UINT CtlID;UINT itemID;UINT itemWidth;UINT itemHeight;ULONG_PTR itemData;"
	Local $MEASUREITEMSTRUCT = DllStructCreate($tagMEASUREITEMSTRUCT, $lParam)
	
	$CtlType = DllStructGetData($MEASUREITEMSTRUCT, "CtlType")
	If $CtlType <> $ODT_LISTBOX Then Return $GUI_RUNDEFMSG
	
	;Set height of the item's (text and background)
	DllStructSetData($MEASUREITEMSTRUCT, 5, 15)
	DllStructSetData($MEASUREITEMSTRUCT, 4, DllStructGetData($MEASUREITEMSTRUCT, 4) + 15)
	
	Return
EndFunc

Func WM_DRAWITEM($hWnd, $Msg, $wParam, $lParam)
	Local $tagDRAWITEMSTRUCT, $cID, $itmID, $itmAction, $itmState, $hItm, $hDC, $hBrush, $hBrushOld
	
	$tagDRAWITEMSTRUCT = DllStructCreate("uint cType;uint cID;uint itmID;uint itmAction;uint itmState;" & _
		"hwnd hItm;hwnd hDC;int itmRect[4];dword itmData", $lParam)
	If DllStructGetData($tagDRAWITEMSTRUCT, "cType") <> $ODT_LISTBOX Then Return $GUI_RUNDEFMSG
	
	$cID = DllStructGetData($tagDRAWITEMSTRUCT, "cID")
	$itmID = DllStructGetData($tagDRAWITEMSTRUCT, "itmID")
	$itmAction = DllStructGetData($tagDRAWITEMSTRUCT, "itmAction")
	$itmState = DllStructGetData($tagDRAWITEMSTRUCT, "itmState")
	$hItm = DllStructGetData($tagDRAWITEMSTRUCT, "hItm")
	$hDC = DllStructGetData($tagDRAWITEMSTRUCT, "hDC")
	
	Switch $itmAction
		Case $ODA_DRAWENTIRE, $ODA_SELECT
			;get the text to be drawn
			Local $iStringLen = _GUICtrlListBox_GetTextLen($hItm, $itmID)
			Local $itmText = _GUICtrlListBox_GetText($hItm, $itmID)
			Local $iBrushColor = 0XFFFFFF, $iTxtColor = 0x000000
			
			If $itmState = $ODS_SELECTED Or $itmState = BitOR($ODS_SELECTED, $ODS_NOACCEL, $ODS_NOFOCUSRECT) Then
				$iBrushColor = _WinAPI_GetSysColor($COLOR_HIGHLIGHT)
				$iTxtColor = 0xFFFFFF
			EndIf
			
			If StringRegExp($itmText, $sSep_RegExp) Then
				$iBrushColor = 0XFFFFFF
				$iTxtColor = 0XCCCCCC
			EndIf
			
			$hBrush = _WinAPI_CreateSolidBrush($iBrushColor)
			$hBrushOld = _WinAPI_SelectObject($hDC, $hBrush)
			
			_WinAPI_SetTextColor($hDC, $iTxtColor)
			_WinAPI_FillRect($hDC, DllStructGetPtr($tagDRAWITEMSTRUCT, "itmRect"), $hBrush)
			_WinAPI_SelectObject($hDC, $hBrushOld)
			_WinAPI_DeleteObject($hBrush)
			_WinAPI_SetBkMode($hDC, 1)
			
			Local $tRECT = DllStructCreate("int Left;int Top;int Right;int Bottom")
			DllStructSetData($tRECT, "Left", DllStructGetData($tagDRAWITEMSTRUCT, "itmRect", 1) + 5)
			DllStructSetData($tRECT, "Top", DllStructGetData($tagDRAWITEMSTRUCT, "itmRect", 2))
			DllStructSetData($tRECT, "Right", DllStructGetData($tagDRAWITEMSTRUCT, "itmRect", 3))
			DllStructSetData($tRECT, "Bottom", DllStructGetData($tagDRAWITEMSTRUCT, "itmRect", 4))
			
			_WinAPI_DrawText($hDC, $itmText, $tRECT, $DT_LEFT)
			
			Return 1
		Case $ODA_FOCUS
			Return 1
	EndSwitch
	
	Return $GUI_RUNDEFMSG
EndFunc