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56 Reference Manual

rc.dwFromBit = bit;

rc.dwToBit = bit;

rc.dwValue = value;

rc.dwOffset =0;

hr = pKs->Get(

PROPSETID_CUSTOMBT848,//idetificador del driver

KSPROPERTY_CUSTOMBT848_GPIO,

INSTANCE_DATA_OF_PROPERTY_PTR(&rc),

INSTANCE_DATA_OF_PROPERTY_SIZE(rc),

&rc,// variable a rellenar con los datos

sizeof(rc),

&ret);

}

pKs->Release();

}

}

DWORD GPIORead(IBaseFilter* pFilter,DWORD bit)

{

IKsPropertySet *pKs = NULL;

DWORD TypeSupport = 0;

KSPROPERTY_CUSTOMBT848_GPIO_S rc;

HRESULT hr;

ULONG ret=0;

DWORD ReturnValue=0;

if (pFilter->QueryInterface(IID_IKsPropertySet,

(void **)&pKs) == S_OK)

{

hr = pKs-

>QuerySupported(PROPSETID_CUSTOMBT848,KSPROPERTY

_CUSTOMBT848_GPIO,&TypeSupport);

if(TypeSupport & KSPROPERTY_SUPPORT_GET)