// 1394.h

typedef struct _IRB_REQ_CONTROL {
  ULONG ulIoControlCode;
  PMDL  pInBuffer;
  ULONG ulInBufferLength;
  PMDL  pOutBuffer;
  ULONG ulOutBufferLength;
  ULONG BytesReturned;
} IRB_REQ_CONTROL;
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Windows Driver Kit DDI reference (ns-1394-_irb_req_control)

_IRB_REQ_CONTROL structure

Description

This structure contains the fields necessary for the 1394 bus driver to carry out a control request.

Members

`ulIoControlCode`

Specifies the control code used in this request. Vendors should make these control codes unique, so that they do not overlap.

`pInBuffer`

Points to an MDL that describes the input buffer. The input buffer contains user-defined information.

`ulInBufferLength`

Specifies the length of the input buffer.

`pOutBuffer`

Points to an MDL that describes the output buffer. The output buffer contains user-defined information.

`ulOutBufferLength`

Specifies the length of the output buffer.

`BytesReturned`

Specifies the number of bytes returned.

View the official Windows Driver Kit DDI reference

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