This function retrieves the power status of the system. The status indicates whether the system is running on AC or DC power, whether or not the batteries are currently charging, and the remaining life of main and backup batteries.
A remote application interface (RAPI) version of this function exists, and it is called CeGetSystemPowerStatusEx (RAPI).
BOOL GetSystemPowerStatusEx( PSYSTEM_POWER_STATUS_EX pstatus, BOOL fUpdate );
[out] Pointer to the SYSTEM_POWER_STATUS_EX structure receiving the power status information.
[in] If this Boolean is set to TRUE, GetSystemPowerStatusEx gets the latest information from the device driver, otherwise it retrieves cached information that may be out-of-date by several seconds.