If ProcExists soslite.exe
      Kill soslite.exe
      RegWriteDWord ( "HKCU", "ControlPanel\Backlight", "BrightNess", "0" )
    else
      Run \Program Files\SOS.Lite\soslite.exe
      RegWriteDWord ( "HKCU", "ControlPanel\Backlight", "BrightNess", "10" )
    Endif