public static Int32 GetBatteryStatus()
{
_SYSTEM_POWER_STATUS_EX2 pwrStat;
// allocate the necessary memory on the native side. We have a class (_SYSTEM_POWER_STATUS_EX2) that
// has the same memory layout as its native counterpart
IntPtr ptr = Utils.LocalAlloc(Marshal.SizeOf(typeof(_SYSTEM_POWER_STATUS_EX2)));
// fill in the required fields
pwrStat = new _SYSTEM_POWER_STATUS_EX2();
UInt32 pwrStatSize = (UInt32)Marshal.SizeOf(typeof(_SYSTEM_POWER_STATUS_EX2));
UInt32 result = GetSystemPowerStatusEx2(ptr, pwrStatSize, 0);
if (result == 0)
{
return(-300);
} // Failure
// native call succeeded, marshal native data to our managed data
pwrStat = (_SYSTEM_POWER_STATUS_EX2)Marshal.PtrToStructure(ptr, typeof(_SYSTEM_POWER_STATUS_EX2));
if (pwrStat.BatteryLifePercent == 0xFF)
{
return(-255);
} // failure - BATTERY_PERCENTAGE_UNKNOWN
if (pwrStat.ACLineStatus == 0x01)
{
return(-(Int32)pwrStat.BatteryLifePercent);
} // OK, but running from AC
return((Int32)pwrStat.BatteryLifePercent);
}
public static Int32 GetBatteryStatus()
{
_SYSTEM_POWER_STATUS_EX2 pwrStat;
// allocate the necessary memory on the native side. We have a class (_SYSTEM_POWER_STATUS_EX2) that
// has the same memory layout as its native counterpart
IntPtr ptr = Utils.LocalAlloc(Marshal.SizeOf(typeof(_SYSTEM_POWER_STATUS_EX2)));
// fill in the required fields
pwrStat = new _SYSTEM_POWER_STATUS_EX2();
UInt32 pwrStatSize = (UInt32)Marshal.SizeOf(typeof(_SYSTEM_POWER_STATUS_EX2));
UInt32 result = GetSystemPowerStatusEx2(ptr, pwrStatSize, 0);
if (result == 0)
{ return -300; } // Failure
// native call succeeded, marshal native data to our managed data
pwrStat = (_SYSTEM_POWER_STATUS_EX2)Marshal.PtrToStructure(ptr, typeof(_SYSTEM_POWER_STATUS_EX2));
if (pwrStat.BatteryLifePercent == 0xFF)
{ return -255; } // failure - BATTERY_PERCENTAGE_UNKNOWN
if (pwrStat.ACLineStatus == 0x01)
{ return -(Int32)pwrStat.BatteryLifePercent; } // OK, but running from AC
return (Int32)pwrStat.BatteryLifePercent;
}
