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ACX_METHOD_ITEM structure (acxrequest.h)

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The ACX_METHOD_ITEM structure describes a method item that is the target of an ACX request.

Syntax

typedef struct _ACX_METHOD_ITEM {
  const GUID                     *Set;
  ULONG                          Id;
  ULONG                          Flags;
  PFN_ACX_OBJECT_PROCESS_REQUEST EvtAcxObjectProcessRequest;
  PVOID                          Reserved;
  ULONG                          ArgsCb;
  ULONG                          ResultCb;
  ULONG                          ResultType;
} ACX_METHOD_ITEM, *PACX_METHOD_ITEM;

Members

Set

Specifies a GUID that identifies a KS (kernel streaming) method item set.

Id

Specifies the member of the member set.

Flags

The Flags field can be used to set the following Flags defined in the AcxRequest header.


#define ACX_METHOD_ITEM_FLAG_NONE               0x00000000
#define ACX_METHOD_ITEM_FLAG_SEND               0x00000001 // KSMETHOD_TYPE_SEND
#define ACX_METHOD_ITEM_FLAG_BASICSUPPORT       0x00000200 // KSMETHOD_TYPE_BASICSUPPORT

EvtAcxObjectProcessRequest

The EVT_ACX_OBJECT_PROCESS_REQUEST callback method handler associated with this item.

Reserved

This field is reserved.

ArgsCb

The minimum count in bytes (size) of the Args buffer. Set to zero if no minimum value.

ResultCb

The minimum count in bytes (size) of the Result buffer. Set to zero if no minimum value.

ResultType

The minimum count in bytes (size) of the Result buffer. Set to zero if there is no minimum value.

Remarks

Example

Example usage is shown below.


static ACX_METHOD_ITEM CircuitMethods[] =
{
    {
        &KSMETHODSETID_AcxTestMethod,
        KSMETHOD_ACXCIRCUIT_TEST_IN2OUT,
        ACX_METHOD_ITEM_FLAG_SEND,
        Codec_EvtTestIn2OutMethodCallback,
        NULL,               // Reserved
        sizeof(ULONG),      // ArgsCb
        sizeof(ULONG),      // ResultCb
    },
};

ACX requirements

Minimum ACX version: 1.0

For more information about ACX versions, see ACX version overview.

Requirements

Requirement Value
Header acxrequest.h

See also