ILogicalSensorManager::Connect method

[ILogicalSensorManager::Connect is no longer available for use as of Windows 8.]

Connects to a logical sensor.

Syntax

HRESULT Connect(
  [in]  REFGUID logicalID,
  [in]  IPropertyStore *pPropertyStore
);

Parameters

logicalID [in]

REFGUID that identifies the logical sensor instance.

pPropertyStore [in]

Pointer to the IPropertyStore interface used to transfer data to the driver instance.

The property store can contain one or more of the following values.

Value	Meaning
PKEY_Device_HardwareIds	(VT_VECTOR|VT_LPWSTR) Required. One or more hardware IDs for the driver to be loaded for the logical device instance. The device hardware ID is defined in the driver's INF file.
PKEY_Device_CompatibleIds	(VT_VECTOR|VTLPWSTR) Optional. An array of compatible hardware IDs.

 

Return value

The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.

Remarks

This method installs the specified logical sensor, if needed. If the logical sensor device node already exists, this method simply creates a connection to make the logical sensor available to the Sensor and Location Platform.

Examples

The following example code creates a helper method that connects to a specified logical sensor. The method parameters receive the sensor hardware ID and a unique GUID to identify the sensor.

HRESULT ConnectToLogicalSensor(PCWSTR* wszHardwareID, GUID guidLogicalID)
{
    HRESULT hr = S_OK;
    
    ILogicalSensorManager* pLSM = NULL;
    IPropertyStore* pStore = NULL;
    PROPVARIANT pv = {};

    // Create the property store.
    hr = PSCreateMemoryPropertyStore(IID_PPV_ARGS(&pStore));

    if(SUCCEEDED(hr))
    {
        // Create the logical sensor manager.
        hr = CoCreateInstance(CLSID_LogicalSensorManager, 
                                NULL, 
                                CLSCTX_INPROC_SERVER, 
                                IID_PPV_ARGS(&pLSM));
    }

    // Fill in the values.
    if(SUCCEEDED(hr))
    {
        hr = InitPropVariantFromStringVector(wszHardwareID, 1, &pv);
    }

    if(SUCCEEDED(hr))
    {
        hr = pStore->SetValue(PKEY_Device_HardwareIds, pv);
    }

    if(SUCCEEDED(hr))
    {
        hr = pStore->SetValue(PKEY_Device_CompatibleIds, pv);
    }

    if(SUCCEEDED(hr))
    {
        // Connect to the logical sensor.
        hr = pLSM->Connect(guidLogicalID, pStore);
    }

    SafeRelease(&pStore);
    SafeRelease(&pLSM);

    return hr;
}

Requirements

See also

About Logical Sensors

ILogicalSensorManager

Using Logical Sensors

Build date: 11/19/2012