public SYSTEM_POWER_INFORMATION GetSystemPowerInformation()
{
SYSTEM_POWER_INFORMATION spi;
CallPowerInformation.CallNtPowerInformation(
12,
IntPtr.Zero,
0,
out spi,
Marshal.SizeOf(typeof(SYSTEM_POWER_INFORMATION)));
return(spi);
}
public SYSTEM_BATTERY_STATE GetBatteryState()
{
SYSTEM_BATTERY_STATE sbs;
CallPowerInformation.CallNtPowerInformation(
5,
IntPtr.Zero,
0,
out sbs,
Marshal.SizeOf(typeof(SYSTEM_BATTERY_STATE)));
return(sbs);
}
public uint ReserveHyberFile()
{
int size = Marshal.SizeOf(typeof(byte));
var pBool = Marshal.AllocHGlobal(size);
Marshal.WriteByte(pBool, 0, 1); // last parameter 0 (FALSE), 1 (TRUE)
uint retval = CallPowerInformation.CallNtPowerInformation(
10,
pBool,
0,
out pBool,
size);
Marshal.FreeHGlobal(pBool);
return(retval);
}
/// <summary>
/// The get last wake time.
/// </summary>
/// <returns>
/// returns time interval in 100-nanosecond units, at the last system wake time
/// </returns>
public double GetLastWakeTime()
{
ulong retvalue;
uint callsuccess = CallPowerInformation.CallNtPowerInformation(
14,
IntPtr.Zero,
0,
out retvalue,
Marshal.SizeOf(typeof(ulong)));
if (callsuccess == StatusSuccess)
{
return((double)retvalue); // VBA only supports Double
}
return(0);
}
public ulong?GetLastWakeTime()
{
uint statusSuccess = 0;
ulong retvalue;
uint callsuccess = CallPowerInformation.CallNtPowerInformation(
14,
IntPtr.Zero,
0,
out retvalue,
Marshal.SizeOf(typeof(ulong)));
if (callsuccess == statusSuccess)
{
return(retvalue);
}
return(null);
}
public SYSTEM_POWER_INFORMATION?GetSystemPowerInformation()
{
uint statusSuccess = 0;
SYSTEM_POWER_INFORMATION spi;
uint retval = CallPowerInformation.CallNtPowerInformation(
12,
IntPtr.Zero,
0,
out spi,
Marshal.SizeOf(typeof(SYSTEM_POWER_INFORMATION)));
if (retval == statusSuccess)
{
return(spi);
}
return(null);
}
public SYSTEM_BATTERY_STATE?GetBatteryState()
{
uint statusSuccess = 0;
SYSTEM_BATTERY_STATE sbs;
uint retval = CallPowerInformation.CallNtPowerInformation(
5,
IntPtr.Zero,
0,
out sbs,
Marshal.SizeOf(typeof(SYSTEM_BATTERY_STATE)));
if (retval == statusSuccess)
{
return(sbs);
}
return(null);
}
public bool FreeHybernatoinFile()
{
int size = Marshal.SizeOf(typeof(byte));
var pBool = Marshal.AllocHGlobal(size);
Marshal.WriteByte(pBool, 0, 0); // last parameter 0 (FALSE), 1 (TRUE)
uint retval = CallPowerInformation.CallNtPowerInformation(
10,
pBool,
Marshal.SizeOf(typeof(bool)),
out pBool,
0);
Marshal.FreeHGlobal(pBool);
if (retval == StatusSuccess)
{
return(true);
}
return(false);
}
public void SetSleepState()
{
CallPowerInformation.SetSuspendState(false, false, false);
}
