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This structure contains the fields necessary for the 1394 bus driver to carry out a control request.
ulIoControlCodeSpecifies the control code used in this request. Vendors should make these control codes unique, so that they do not overlap.
pInBufferPoints to an MDL that describes the input buffer. The input buffer contains user-defined information.
ulInBufferLengthSpecifies the length of the input buffer.
pOutBufferPoints to an MDL that describes the output buffer. The output buffer contains user-defined information.
ulOutBufferLengthSpecifies the length of the output buffer.
BytesReturnedSpecifies the number of bytes returned.