Configurations Property

项目
09/21/2010

The Configurations property gets a ISoftUSBConfigurations object that holds the collection of ISoftUSBConfiguration objects that represent the set of configurations that a device supports.

This property is read-only.

Syntax

HRESULT get_Configurations(
  [out, retval]  ISoftUSBConfigurations **ppiConfigurationList
);

Property Value

Caller-allocated space to hold the configuration collection.

Error Codes

Configurations returns S_OK if the operation succeeds or E_POINTER if the ppiConfigurationList parameter is not a valid pointer.

Remarks

The following C++ code example shows how to get the Configurations property.

HRESULT CLoopBackDevice::GetCurrentConfig(ISoftUSBConfigurations **ppiConfigList)
{
HRESULT hr = OK:
 

 if (NULL == m_piDevice)
{
 hr = E_UNEXPECTED;
 goto Exit;
}

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

// Initialize the return parameter
*ppiConfigList = NULL;

// Get the configuration list 
 hr = m_piDevice ->get_Configurations(reinterpret_cast< SoftUSBConfigurations **>(&piConfigList));
Exit:
 return hr;
}

Requirements

Header

SoftUSBif.h

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