INativeListener.OnControlTransfer Method

Native (C++):

HRESULT OnControlTransfer ( _FILETIME * fTime,void * pData,unsigned long Size,void * SetupPacket,unsigned long SetupPacketSize) ;

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);

SetupPacket Pointer to the setup packet:

C++

          _URB_CONTROL_TRANSFER& r=pUrb->urb.UrbControlTransfer;
          BYTE* pSetupPacket = &(r.SetupPacket[0]);

SetupPacketSize Size of the setup packet.

Return Value

S_OK or standard OLE error code.

Remarks

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

< PreviousTopNext >