Window in Window

Func _WindowInWindow($Child, $Parent)
    $nExStyle = DllCall("user32.dll", "int", "GetWindowLong", "hwnd", $Child, "int", 0)
    DllCall("user32.dll", "int", "SetWindowLong", "hwnd", $Child, "int", 0, "int", BitOR($nExStyle[0], 0x00000040))
    DllCall("user32.dll", "int", "SetParent", "hwnd", $Child, "hwnd", $Parent)
    Return SetError(@error, @extended)
EndFunc