public static void ShowSystemPowerInformation()
{
SystemPowerInformation state = new SystemPowerInformation();
var ptr = IntPtr.Zero;
try
{
ptr = Marshal.AllocCoTaskMem(Marshal.SizeOf(typeof(SystemPowerInformation)));
uint retval = CallNtPowerInformation(
SYSTEM_POWER_INFORMATION_LEVEL,
IntPtr.Zero,
0,
ptr,
Marshal.SizeOf(typeof(SystemPowerInformation))
);
if (retval == STATUS_SUCCESS)
{
state = Marshal.PtrToStructure <SystemPowerInformation>(ptr);
}
}
finally
{
if (ptr != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(ptr);
}
}
ShowAllPowerInfo(state);
}
public static extern uint CallNtPowerInformation(
int InformationLevel,
IntPtr lpInputBuffer,
int nInputBufferSize,
out SystemPowerInformation spi,
int nOutputBufferSize
);
public SystemPowerInformation GetSystemPowerInformation()
{
IntPtr systemBatteryStatePtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(typeof(SystemPowerInformation)));
int status = CallNtPowerInformation(SystemPowerInformation, IntPtr.Zero, 0, systemBatteryStatePtr,
Marshal.SizeOf(typeof(SystemPowerInformation)));
SystemPowerInformation spInformation = (SystemPowerInformation)Marshal.PtrToStructure(systemBatteryStatePtr, typeof(SystemPowerInformation));
Marshal.FreeHGlobal(systemBatteryStatePtr);
return(spInformation);
}
internal static extern uint CallNtPowerInformation(PowerInformationLevel informationLevel,
IntPtr inputBuffer, int inputBufferSize,
out SystemPowerInformation outputBuffer, int outputBufferSize);
public static extern PowerInformationStatus CallNtPowerInformation(
PowerInformationLevel informationLevel,
IntPtr inputBuffer,
int inputBufferSize,
out SystemPowerInformation systemBatteryState,
int outputBufferSize);
private static extern NtStatus CallNtPowerInformation(
PowerInformationLevel informationLevel,
IntPtr inputBuffer,
int inputBufferSize,
out SystemPowerInformation outputBuffer,
int outputBufferSize);
