Checkbox backcolor in tab

[anonymous]

#include <ButtonConstants.au3>
#include <GUIConstantsEx.au3>
#include <TabConstants.au3>
#include <WindowsConstants.au3>

$Form1 = GUICreate("Form1", 500, 300, 192, 50)
$Checkbox0 = GUICtrlCreateCheckbox("work", 130, 24, 185, 65)
$Tab1 = GUICtrlCreateTab(120, 120, 305, 169)
GUICtrlSetResizing(-1, $GUI_DOCKWIDTH+$GUI_DOCKHEIGHT)
$TabSheet1 = GUICtrlCreateTabItem("TabSheet1")
$TabSheet2 = GUICtrlCreateTabItem("TabSheet2")
GUICtrlSetState(-1,$GUI_SHOW)
;not work in tab.(backcolor)
$Checkbox1 = GUICtrlCreateCheckbox("not work", 130, 150, 60, 12 )
$Checkbox2 = GUICtrlCreateCheckbox(@AutoItVersion, 130, 176, 60, 12 )
GUICtrlSetBkColor(-1,0xffffff)
GUICtrlCreateTabItem("")
GUISetState(@SW_SHOW)

While 1
	$nMsg = GUIGetMsg()
	Switch $nMsg
		Case $GUI_EVENT_CLOSE
			Exit
	EndSwitch
WEnd