IFACEMETHODIMP OnEvent(
_In_ IPortableDeviceValues* eventParameters)
{
if (eventParameters != nullptr)
{
wprintf(L"***************************\n** Device event received **\n***************************\n");
DisplayStringProperty(eventParameters, WPD_EVENT_PARAMETER_PNP_DEVICE_ID, L"WPD_EVENT_PARAMETER_PNP_DEVICE_ID");
DisplayGuidProperty(eventParameters, WPD_EVENT_PARAMETER_EVENT_ID, L"WPD_EVENT_PARAMETER_EVENT_ID");
}
return S_OK;
}
HRESULT __stdcall OnEvent(
IPortableDeviceValues* pEventParameters)
{
if (pEventParameters != NULL)
{
printf("***************************\n** Device event received **\n***************************\n");
DisplayStringProperty(pEventParameters, WPD_EVENT_PARAMETER_PNP_DEVICE_ID, L"WPD_EVENT_PARAMETER_PNP_DEVICE_ID");
DisplayGuidProperty(pEventParameters, WPD_EVENT_PARAMETER_EVENT_ID, L"WPD_EVENT_PARAMETER_EVENT_ID");
}
return S_OK;
}
HRESULT __stdcall OnProgress(
REFGUID Context,
IPortableDeviceValuesCollection* pValues)
{
DWORD dwNumElements = 0;
HRESULT hr = pValues->GetCount(&dwNumElements);
if (FAILED(hr))
{
printf("! Failed to get number of elements from IPortableDeviceValuesCollection, hr = 0x%lx\n",hr);
}
printf("Received next batch of %d object value elements..., Context = %ws\n", dwNumElements, (PWSTR)CGuidToString(Context));
// Display the returned properties to the user.
// NOTE: We are reading for expected properties, which were setup in the
// QueueGetXXXXXX bulk operation call.
if (SUCCEEDED(hr))
{
for (DWORD dwIndex = 0; dwIndex < dwNumElements; dwIndex++)
{
CComPtr<IPortableDeviceValues> pObjectProperties;
hr = pValues->GetAt(dwIndex, &pObjectProperties);
if (SUCCEEDED(hr))
{
DisplayStringProperty(pObjectProperties, WPD_OBJECT_PARENT_ID, L"WPD_OBJECT_PARENT_ID");
DisplayStringProperty(pObjectProperties, WPD_OBJECT_NAME, L"WPD_OBJECT_NAME");
DisplayStringProperty(pObjectProperties, WPD_OBJECT_PERSISTENT_UNIQUE_ID, L"WPD_OBJECT_PERSISTENT_UNIQUE_ID");
DisplayGuidProperty (pObjectProperties, WPD_OBJECT_CONTENT_TYPE, L"WPD_OBJECT_CONTENT_TYPE");
DisplayGuidProperty (pObjectProperties, WPD_OBJECT_FORMAT, L"WPD_OBJECT_FORMAT");
printf("\n\n");
}
else
{
printf("! Failed to get IPortableDeviceValues from IPortableDeviceValuesCollection at index '%d'\n", dwIndex);
}
}
}
return hr;
}
// Reads properties for the user specified object.
void ReadContentProperties(
IPortableDevice* pDevice)
{
if (pDevice == NULL)
{
printf("! A NULL IPortableDevice interface pointer was received\n");
return;
}
HRESULT hr = S_OK;
WCHAR szSelection[81] = {0};
CComPtr<IPortableDeviceProperties> pProperties;
CComPtr<IPortableDeviceValues> pObjectProperties;
CComPtr<IPortableDeviceContent> pContent;
CComPtr<IPortableDeviceKeyCollection> pPropertiesToRead;
// Prompt user to enter an object identifier on the device to read properties from.
printf("Enter the identifer of the object you wish to read properties from.\n>");
hr = StringCbGetsW(szSelection,sizeof(szSelection));
if (FAILED(hr))
{
printf("An invalid object identifier was specified, aborting property reading\n");
}
// 1) Get an IPortableDeviceContent interface from the IPortableDevice interface to
// access the content-specific methods.
if (SUCCEEDED(hr))
{
hr = pDevice->Content(&pContent);
if (FAILED(hr))
{
printf("! Failed to get IPortableDeviceContent from IPortableDevice, hr = 0x%lx\n",hr);
}
}
// 2) Get an IPortableDeviceProperties interface from the IPortableDeviceContent interface
// to access the property-specific methods.
if (SUCCEEDED(hr))
{
hr = pContent->Properties(&pProperties);
if (FAILED(hr))
{
printf("! Failed to get IPortableDeviceProperties from IPortableDevice, hr = 0x%lx\n",hr);
}
}
// 3) CoCreate an IPortableDeviceKeyCollection interface to hold the the property keys
// we wish to read.
//<SnippetContentProp1>
hr = CoCreateInstance(CLSID_PortableDeviceKeyCollection,
NULL,
CLSCTX_INPROC_SERVER,
IID_PPV_ARGS(&pPropertiesToRead));
if (SUCCEEDED(hr))
{
// 4) Populate the IPortableDeviceKeyCollection with the keys we wish to read.
// NOTE: We are not handling any special error cases here so we can proceed with
// adding as many of the target properties as we can.
if (pPropertiesToRead != NULL)
{
HRESULT hrTemp = S_OK;
hrTemp = pPropertiesToRead->Add(WPD_OBJECT_PARENT_ID);
if (FAILED(hrTemp))
{
printf("! Failed to add WPD_OBJECT_PARENT_ID to IPortableDeviceKeyCollection, hr= 0x%lx\n", hrTemp);
}
hrTemp = pPropertiesToRead->Add(WPD_OBJECT_NAME);
if (FAILED(hrTemp))
{
printf("! Failed to add WPD_OBJECT_NAME to IPortableDeviceKeyCollection, hr= 0x%lx\n", hrTemp);
}
hrTemp = pPropertiesToRead->Add(WPD_OBJECT_PERSISTENT_UNIQUE_ID);
if (FAILED(hrTemp))
{
printf("! Failed to add WPD_OBJECT_PERSISTENT_UNIQUE_ID to IPortableDeviceKeyCollection, hr= 0x%lx\n", hrTemp);
}
hrTemp = pPropertiesToRead->Add(WPD_OBJECT_FORMAT);
if (FAILED(hrTemp))
{
printf("! Failed to add WPD_OBJECT_FORMAT to IPortableDeviceKeyCollection, hr= 0x%lx\n", hrTemp);
}
hrTemp = pPropertiesToRead->Add(WPD_OBJECT_CONTENT_TYPE);
if (FAILED(hrTemp))
{
printf("! Failed to add WPD_OBJECT_CONTENT_TYPE to IPortableDeviceKeyCollection, hr= 0x%lx\n", hrTemp);
}
}
}
//</SnippetContentProp1>
// 5) Call GetValues() passing the collection of specified PROPERTYKEYs.
//<SnippetContentProp2>
if (SUCCEEDED(hr))
{
hr = pProperties->GetValues(szSelection, // The object whose properties we are reading
pPropertiesToRead, // The properties we want to read
&pObjectProperties); // Driver supplied property values for the specified object
if (FAILED(hr))
{
printf("! Failed to get all properties for object '%ws', hr= 0x%lx\n", szSelection, hr);
}
}
//</SnippetContentProp2>
// 6) Display the returned property values to the user
if (SUCCEEDED(hr))
{
DisplayStringProperty(pObjectProperties, WPD_OBJECT_PARENT_ID, L"WPD_OBJECT_PARENT_ID");
DisplayStringProperty(pObjectProperties, WPD_OBJECT_NAME, L"WPD_OBJECT_NAME");
DisplayStringProperty(pObjectProperties, WPD_OBJECT_PERSISTENT_UNIQUE_ID, L"WPD_OBJECT_PERSISTENT_UNIQUE_ID");
DisplayGuidProperty (pObjectProperties, WPD_OBJECT_CONTENT_TYPE, L"WPD_OBJECT_CONTENT_TYPE");
DisplayGuidProperty (pObjectProperties, WPD_OBJECT_FORMAT, L"WPD_OBJECT_FORMAT");
}
}
