Configuration Property

项目
09/21/2010

The Configuration property gets the number of the device's currently selected configuration.

This property is read-only.

Syntax

HRESULT get_Configuration(
  [out, retval]  BYTE *pbConfig
);

Property Value

Caller-allocated space to hold the current configuration number.

Error Codes

Configuration returns S_OK if the operation succeeds or E_POINTER if the pbConfig parameter is not a valid pointer.

Remarks

The number that the Configuration property retrieves is the same number that the ISoftUSBConfiguration::ConfigurationValue property returns. You can use this property to determine the response data that is returned from a GET_CONFIGURATION request that is sent to the device, as described in section 9.4.2 of the USB 2.0 specification.

The following C++ code example how to set and get the Configuration property.

HRESULT GetCurrentConfig(BYTE *pbCurrentConfiguration)
{
HRESULT hr = OK:
 


 if (NULL == pbCurrentConfiguration)
{
 hr = E_POINTER;
 goto Exit;
}


// Get the number of the configuration.
 hr = m_piDevice->get_Configuration (pbCurrentConfiguation);
Exit:
 return hr;
}

Requirements

Header

SoftUSBif.h

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