ShutDwnProcPtr
typedef pascal void (*ShutDwnProcPtr)(void);
sdOnPowerOff 1 call procedure before power off
sdOnRestart 2 call procedure before restart
sdOnUnmount 4 call procedure before unmounting
sdOnDrivers 8 call procedure before closing drivers
sdRestartOrPower sdOnPowerOff + sdOnRestart call before power off or restart