[DllImport("powrprof.dll", SetLastError=true)]
private static extern UInt32 CallNtPowerInformation(
Int32 InformationLevel,
IntPtr lpInputBuffer,
UInt32 nInputBufferSize,
IntPtr lpOutputBuffer,
UInt32 nOutputBufferSize);
[DllImport("powrprof.dll", SetLastError = true)]
private static extern uint CallNtPowerInformation(
int informationLevel,
IntPtr lpInputBuffer,
uint nInputBufferSize,
IntPtr lpOutputBuffer,
uint nOutputBufferSize);
<DllImport("powrprof.dll", SetLastError := True)> _
Private Shared Function CallNtPowerInformation(InformationLevel As Int32, lpInputBuffer As IntPtr, nInputBufferSize As UInt32, lpOutputBuffer As IntPtr, nOutputBufferSize As UInt32) As UInt32
End Function
None.
Do you know one? Please contribute it!
InformationLevel parameter must be one of the POWER_INFORMATION_LEVEL enumeration type values.
This is obsolete on Vista. Try GetCurrentPowerPolicies() to get information on both XP and Vista.
IntPtr status = Marshal.AllocCoTaskMem(Marshal.SizeOf(typeof(SYSTEM_BATTERY_STATE)));
uint retval = CallNtPowerInformation(
5, // SystemBatteryState
(IntPtr)null,
0,
status,
(UInt32)Marshal.SizeOf(typeof(SYSTEM_BATTERY_STATE))
);
SYSTEM_BATTERY_STATE batt_status = (SYSTEM_BATTERY_STATE)Marshal.PtrToStructure(status, typeof(SYSTEM_BATTERY_STATE));
class Program
{
const int ProcessorInformation = 11;
const uint STATUS_SUCCESS = 0;
[StructLayout(LayoutKind.Sequential)]
struct PROCESSOR_POWER_INFORMATION
{
public uint Number;
public uint MaxMhz;
public uint CurrentMhz;
public uint MhzLimit;
public uint MaxIdleState;
public uint CurrentIdleState;
}
[DllImport("powrprof.dll")]
static extern uint CallNtPowerInformation(
int InformationLevel,
IntPtr lpInputBuffer,
int nInputBufferSize,
[Out] PROCESSOR_POWER_INFORMATION[] lpOutputBuffer,
int nOutputBufferSize
);
static void Main(string[] args)
{
int procCount = Environment.ProcessorCount;
PROCESSOR_POWER_INFORMATION[] procInfo =
new PROCESSOR_POWER_INFORMATION[procCount];
uint retval = CallNtPowerInformation(
ProcessorInformation,
IntPtr.Zero,
0,
procInfo,
procInfo.Length * Marshal.SizeOf(typeof(PROCESSOR_POWER_INFORMATION))
);
if (retval == STATUS_SUCCESS)
{
foreach (var item in procInfo)
{
Console.WriteLine(item.CurrentMhz);
}
}
}
}