註冊硬體錯誤事件的通知

若要註冊以收到新硬體錯誤事件的通知，應用程式會建立 Microsoft-Windows-Kernel-WHEA/Errors 通道所引發之所有事件的訂用帳戶。

建議針對伺服器案例使用此通道。 雖然資料無法立即讀取，但它是 ACPI/UEFI 定義的 一般平臺錯誤記錄， (CPER) 。 相較于 Microsoft-Windows-WHEA-Logger 提供者，此格式提供每個硬體錯誤事件確切的詳細資料。

下列程式碼範例示範如何註冊新硬體錯誤事件的通知。

// Prototype for the notification callback function
DWORD WINAPI HwErrorEventCallback(
  EVT_SUBSCRIBE_NOTIFY_ACTION Action,
  PVOID Context,
  EVT_HANDLE EventHandle
  );

// Function to create a subscription to all hardware error
// events that are raised by the WHEA provider.
EVT_HANDLE SubscribeHwErrorEvents(VOID)
{
  EVT_HANDLE SubHandle;

  // Create a subscription to all events that are sent
  // to the WHEA channel.
#if (WINVER <= _WIN32_WINNT_LONGHORN)
  SubHandle =
    EvtSubscribe(
      NULL,
      NULL,
      L"Microsoft-Windows-Kernel-WHEA", 
      L"*",
      NULL,
      NULL,
      HwErrorEventCallback,
      EvtSubscribeToFutureEvents
      );
#else
  SubHandle =
    EvtSubscribe(
      NULL,
      NULL,
      L" Microsoft-Windows-Kernel-WHEA/Errors", 
      L"*",
      NULL,
      NULL,
      HwErrorEventCallback,
      EvtSubscribeToFutureEvents
      );
#endif

   // Return the subscription handle
   return SubHandle;
}

// Notification callback function
DWORD WINAPI HwErrorEventCallback(
  EVT_SUBSCRIBE_NOTIFY_ACTION Action,
  PVOID Context,
  EVT_HANDLE EventHandle
  )
{
  // Check the action
  if (Action == EvtSubscribeActionDeliver) {

    // Process the hardware error event
    ProcessHwErrorEvent(EventHandle);
  }

  // Return success status
  return ERROR_SUCCESS;
}

// Function to terminate the subscription
VOID UnsubscribeHwErrorEvents(EVT_HANDLE SubHandle)
{
  // Close the subscription handle
  EvtClose(SubHandle);
}