Sie könnten CallNtPowerInformation
API-Funktion, die die folgenden params nimmt anrufen möchten:
NTSTATUS WINAPI CallNtPowerInformation(
_In_ POWER_INFORMATION_LEVEL InformationLevel,
_In_ PVOID lpInputBuffer,
_In_ ULONG nInputBufferSize,
_Out_ PVOID lpOutputBuffer,
_In_ ULONG nOutputBufferSize
);
Im InformationLevel
paramer Sie passieren den SystemPowerInformation
ENUM-Wert, der die lpOutputBuffer
mit einem füllt SYSTEM_POWER_INFORMATION
Struktur:
typedef struct _SYSTEM_POWER_INFORMATION {
ULONG MaxIdlenessAllowed;
ULONG Idleness;
ULONG TimeRemaining;
UCHAR CoolingMode;
} SYSTEM_POWER_INFORMATION, *PSYSTEM_POWER_INFORMATION;
erhalten dann die TimeRemaining
, die in Sekunden ausgedrückt wird.
bearbeiten: in VB.NET getestet. bearbeiten: Code hinzugefügt.
Queryer.vb
Imports System.Runtime.InteropServices
Public Class Queryer
Const SystemPowerInformation As Integer = 12
Const STATUS_SUCCESS As Integer = 0
Private Structure SYSTEM_POWER_INFORMATION
Public MaxIdlenessAllowed As UInteger
Public Idleness As UInteger
Public TimeRemaining As Integer
Public CoolingMode As Byte
End Structure
<DllImport("PowrProf.dll", SetLastError:=True, CharSet:=CharSet.Auto)>
Public Shared Function CallNtPowerInformation(
ByVal InformationLevel As Int32,
ByVal lpInputBuffer As IntPtr,
ByVal nInputBufferSize As UInt32,
ByVal lpOutputBuffer As IntPtr,
ByRef nOutputBufferSize As UInt32) As UInt32
End Function
Public Function Query() As Integer
Dim PowerInformation As SYSTEM_POWER_INFORMATION
Dim Status As IntPtr = IntPtr.Zero
Dim ReturnValue As UInteger
Try
Status = Marshal.AllocCoTaskMem(Marshal.SizeOf(GetType(SYSTEM_POWER_INFORMATION)))
ReturnValue = CallNtPowerInformation(SystemPowerInformation, Nothing, 0, Status, Marshal.SizeOf(GetType(SYSTEM_POWER_INFORMATION)))
PowerInformation = Marshal.PtrToStructure(Status, GetType(SYSTEM_POWER_INFORMATION))
Catch ex As Exception
Return 0
Finally
Marshal.FreeCoTaskMem(Status)
End Try
Return PowerInformation.TimeRemaining
End Function
End Class
Form:
Public Class Form1
Public Sub Loader() Handles Me.Load
Dim rolex As New Timer()
rolex.Interval = 500
AddHandler rolex.Tick, AddressOf TimerScattato
rolex.Start()
End Sub
Private Sub TimerScattato()
Dim secondi As Integer = q.Query()
Dim iSpan As TimeSpan = TimeSpan.FromSeconds(secondi)
lblTimeLeft.Text = String.Format("{0,2}:{1,2}:{2,2}", iSpan.Hours, iSpan.Minutes, iSpan.Seconds)
End Sub
Private q As New Queryer
End Class
[? Was Sie versucht haben] (http://mattgemmell.com/what-have-you-tried/) – Drop
Ich habe überall nach einem Startpunkt gesucht und konnte nicht einmal eine Frage wie diese finden. Also, ich habe keinen Code. –
https://msdn.microsoft.com/en-us/library/windows/desktop/aa373217%28v=vs.85%29.aspx –