internal static extern UInt32 CallNtPowerInformation(
PowerInformationLevel informationLevel,
IntPtr inputBuffer,
UInt32 inputBufferSize,
out SystemBatteryState outputBuffer,
UInt32 outputBufferSize
);
public static extern uint CallNtPowerInformation(
PowerInformationLevel informationLevel,
IntPtr inputBuffer,
uint inputBufferSize,
out SystemBatteryState outputBuffer,
uint outputBufferSize
);
public static extern uint CallNtPowerInformation(
InfoLevel informationLevel,
IntPtr inputBuffer,
int inputBufferSize,
[MarshalAs(UnmanagedType.Struct)]
out SystemBatteryState result,
int resultSize);
public static void ShowSystemBatteryState()
{
SystemBatteryState state = new SystemBatteryState();
var ptr = IntPtr.Zero;
try
{
ptr = Marshal.AllocCoTaskMem(Marshal.SizeOf(typeof(SystemBatteryState)));
uint retval = CallNtPowerInformation(
SYSTEM_BATTERY_STATE_LEVEL,
IntPtr.Zero,
0,
ptr,
Marshal.SizeOf(typeof(SystemBatteryState))
);
if (retval == STATUS_SUCCESS)
{
state = Marshal.PtrToStructure <SystemBatteryState>(ptr);
}
}
finally
{
if (ptr != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(ptr);
}
}
ShowAllPowerInfo(state);
}
public static extern uint CallNtPowerInformation(
int InformationLevel,
IntPtr lpInputBuffer,
int nInputBufferSize,
out SystemBatteryState sbs,
int nOutputBufferSize
);
public SystemBatteryState GetSystemBatteryState()
{
IntPtr systemBatteryStatePtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(typeof(SystemBatteryState)));
int status = CallNtPowerInformation(SystemBatteryState, IntPtr.Zero, 0, systemBatteryStatePtr,
Marshal.SizeOf(typeof(SystemBatteryState)));
SystemBatteryState btState = (SystemBatteryState)Marshal.PtrToStructure(systemBatteryStatePtr, typeof(SystemBatteryState));
Marshal.FreeHGlobal(systemBatteryStatePtr);
return(btState);
}
internal static extern UInt32 CallNtPowerInformation(
PowerInformationLevel informationLevel,
IntPtr inputBuffer,
UInt32 inputBufferSize,
out SystemBatteryState outputBuffer,
UInt32 outputBufferSize
);
private static extern NtStatus CallNtPowerInformation(
PowerInformationLevel informationLevel,
IntPtr inputBuffer,
int inputBufferSize,
out SystemBatteryState outputBuffer,
int outputBufferSize);