DescriptorType Property

Article
09/21/2010

The DescriptorType property gets or sets the value of the bDescriptorType field of the endpoint descriptor, as described in section 9.6.6 of the USB 2.0 specification.

This property is read/write.

Syntax

HRESULT put_DescriptorType(
  [in]           BYTE bDescriptorType
);

HRESULT get_DescriptorType(
  [out, retval]  BYTE *pbDescriptorType
);

Property Value

The new descriptor type.

Error Codes

DescriptorType returns S_OK if the operation succeeds or E_POINTER if the pbDescriptorType parameter is not a valid pointer.

Remarks

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

HRESULT CLoopBackDevice::GetEndpointType(BYTE *pbType)
{
HRESULT hr = S_OK;

 if (NULL == m_piEndpoint)
{
 hr = E_INVALIDARG;
 goto Exit;
}

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

// Initialize the return size
*pbType = 0;

 hr = m_piEndpoint ->get_DescriptorType(pbType);
Exit:
 return hr;
}

Requirements

Header

SoftUSBif.h

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