取得所有錯誤來源的錯誤來源資訊

使用者模式應用程式可以藉由呼叫WHEAErrorSourceMethods：：GetAllErrorSourcesRtn方法，取得系統中所有錯誤來源的相關資訊。 這個方法會傳回 WHEA_ERROR_SOURCE_DESCRIPTOR 結構的陣列，描述硬體平臺支援的所有錯誤來源。

下列程式碼範例示範如何取得系統中所有錯誤來源的錯誤來源資訊。

IWbemServices *pIWbemServices;
BSTR ClassName;
BSTR MethodName;
HRESULT Result;
IWbemClassObject *pOutParameters;
VARIANT Parameter;
ULONG Status;
ULONG Count;
ULONG Length;
SAFEARRAY *Array;
PWHEA_ERROR_SOURCE_DESCRIPTOR ErrorSourceList;

// The following example assumes that the application
// has previously connected to WMI on the local machine
// and that the pIWbemServices variable contains the
// pointer that was returned from the call to the
// IWbemLocator::ConnectServer method.

// Specify the class and method to execute
ClassName = SysAllocString(L"WHEAErrorSourceMethods");
MethodName = SysAllocString(L"GetAllErrorSourcesRtn");

// Call the GetAllErrorSourcesRtn method indirectly
// by calling the IWbemServices::ExecMethod method.
Result =
  pIWbemServices->ExecMethod(
    ClassName,
    MethodName,
    0,
    NULL,
    NULL,
    &pOutParameters,
    NULL
    );

// Get the status from the output parameters object
Result =
  pOutParameters->Get(
    L"Status",
    0,
    &Parameter,
    NULL,
    NULL
    );
Status = Parameter.ulval;
VariantClear(&Parameter);

// Get the count from the output parameters object
Result =
  pOutParameters->Get(
    L"Count",
    0,
    &Parameter,
    NULL,
    NULL
    );
Count = Parameter.ulval;
VariantClear(&Parameter);

// Get the length from the output parameters object
Result =
  pOutParameters->Get(
    L"Length",
    0,
    &Parameter,
    NULL,
    NULL
    );
Length = Parameter.ulval;
VariantClear(&Parameter);

// Get the data buffer from the output parameters object
Result =
  pOutParameters->Get(
    L"ErrorSourceArray",
    0,
    &Parameter,
    NULL,
    NULL
    );
Array = Parameter.parray;

// Get access to the data buffer
Result =
  SafeArrayAccessData(
    Array,
    &ErrorSourceList
    );

// Process the error source information.
...

// If the error source information is to be saved
// for later use, the data in the ErrorSourceList
// array must be copied to an application-allocated
// array of WHEA_ERROR_SOURCE_DESCRIPTOR structures
// before freeing up the resources.
...

// Free the array containing the error source information
SafeArrayUnaccessData(Array);
VariantClear(&Parameter);

// Free up resources
SysFreeString(ClassName);
SysFreeString(MethodName);
pOutParameters->Release();