Centrinar,
Так Checkbox и так вроде без подложки. Можно еще фокус другому элементу передать.
Код:
#include <GUIConstantsEx.au3>
#include <StaticConstants.au3>
#include <WindowsConstants.au3>
#region ### START Koda GUI section ### Form=
$Form1 = GUICreate("Form1", 429, 218, -1, -1)
GUISetBkColor(0xFFFFCC)
$Label1 = GUICtrlCreateLabel("Label1", 24, 5, 36, 18)
GUICtrlSetBkColor(-1, $GUI_BKCOLOR_TRANSPARENT)
$Checkbox1 = GUICtrlCreateCheckbox("Checkbox1", 16, 32, 89, 33)
$Checkbox2 = GUICtrlCreateCheckbox("Checkbox2", 16, 62, 89, 33)
$Button1 = GUICtrlCreateButton("Button1", 176, 24, 153, 65)
GUICtrlSetState(-1, $GUI_FOCUS)
GUISetState(@SW_SHOW)
#endregion ### END Koda GUI section ###
While 1
$nMsg = GUIGetMsg()
Switch $nMsg
Case $GUI_EVENT_CLOSE
Exit
EndSwitch
WEnd