INativeListener.OnClearFeatureToDevice Method

Native (C++):

HRESULT OnClearFeatureToDevice ( _FILETIME * fTime,void * pData,unsigned long Size,unsigned short FeatureSelector,unsigned short nIndex) ;

Parameters

fTime The time of the event. pData Pointer to a USBPACKET. Use it to manually parse all fields. See MFCSample for more details. Size Total size of USBPACKET and all payload data. Equals to nSize variable:

C++

          USBPACKET packet;
          ULONG nSize = packet->Size;

          USBPACKET_URB* pUrb = (USBPACKET_URB*)packet;
          ATLASSERT(pUrb->Size==nSize);

FeatureSelector Specifies the USB-defined feature code to be cleared or set. Using a feature code that is invalid, cannot be set, or cannot be cleared will cause the target to stall. The bus driver will copy the value in the FeatureSelector member to the wValue field of the setup packet. nIndex Specifies the device-defined index, returned by a successful configuration request, if the request is for an endpoint or interface. Otherwise, Index must be zero. The bus driver will copy the value in the Index member to the wIndex field of the setup packet.

Return Value

S_OK or standard OLE error code.

Remarks

Fired when URB packet with urb.UrbHeader.Function=URB_FUNCTION_CLEAR_FEATURE_TO_DEVICE is received. See _URB_CONTROL_FEATURE_REQUEST for more details. The library decodes several parameters from this packet (see above).

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