AcxObjectBagOpen function (acxmisc.h)

Article
02/22/2024

The function AcxObjectBagOpen opens an existing, initialized AcxObjectBag.

Syntax

NTSTATUS AcxObjectBagOpen(
  PWDF_OBJECT_ATTRIBUTES Attributes,
  PACX_OBJECTBAG_CONFIG  Config,
  ACXOBJECTBAG           *ObjectBag
);

Parameters

Attributes

Additional Attributes defined using a WDF_OBJECT_ATTRIBUTES structure that are used to set various object's values: cleanup and destroy callbacks, context type, and to specify its parent object.

Config

A pointer to the initialized ACX_OBJECTBAG_CONFIG structure.

ObjectBag

An initialized ObjectBag ACX object. For more information, see ACX - Summary of ACX Objects.

Return value

Returns STATUS_SUCCESS if the call was successful. Otherwise, it returns an appropriate error code. For more information, see Using NTSTATUS Values.

Remarks

Example

This example shows the use of ACX_OBJECTBAG_CONFIG.

        GUID                    uniqueId = { 0 };
        UNICODE_STRING          uniqueIdStr = { 0 };
        UNICODE_STRING          pnpDeviceId = { 0 };
        ACX_OBJECTBAG_CONFIG    objBagCfg;

        DECLARE_CONST_ACXOBJECTBAG_SYSTEM_PROPERTY_NAME(UniqueID);

        ACX_OBJECTBAG_CONFIG_INIT(&objBagCfg);
        objBagCfg.Handle = CircuitConfig->CompositeProperties;
        objBagCfg.Flags |= AcxObjectBagConfigOpenWithHandle;

        WDF_OBJECT_ATTRIBUTES_INIT(&attributes);
        ACXOBJECTBAG objBag = NULL;

        RETURN_NTSTATUS_IF_FAILED(AcxObjectBagOpen(&attributes, &objBagCfg, &objBag));
        auto objBag_free = scope_exit([&objBag]() {
            WdfObjectDelete(objBag);
            });

        RETURN_NTSTATUS_IF_FAILED(AcxObjectBagRetrieveGuid(objBag, &UniqueID, &uniqueId));

ACX requirements

Minimum ACX version: 1.0

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

Requirements

Requirement	Value
Header	acxmisc.h
IRQL	PASSIVE_LEVEL

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