WDF_CHILD_IDENTIFICATION_DESCRIPTION_HEADER structure (wdfchildlist.h)
[Applies to KMDF only]
The WDF_CHILD_IDENTIFICATION_DESCRIPTION_HEADER structure is a header structure that must be the first member of every identification description structure.
Syntax
typedef struct _WDF_CHILD_IDENTIFICATION_DESCRIPTION_HEADER {
ULONG IdentificationDescriptionSize;
} WDF_CHILD_IDENTIFICATION_DESCRIPTION_HEADER, *PWDF_CHILD_IDENTIFICATION_DESCRIPTION_HEADER;
Members
IdentificationDescriptionSize
The size, in bytes, of a driver-defined structure that contains device identification information.
Remarks
To initialize a WDF_CHILD_IDENTIFICATION_DESCRIPTION_HEADER structure, your driver should call WDF_CHILD_IDENTIFICATION_DESCRIPTION_HEADER_INIT.
The value that the driver specifies for the IdentificationDescriptionSize member must match the value it specifies for the IdentificationDescriptionSize member in its WDF_CHILD_LIST_CONFIG structure.
Identification description structures are driver-defined. The driver must store the structure's size in the IdentificationDescriptionSize member. The size value must include the size of this header structure. For example, a driver might define an identification descriptor as follows:
typedef struct _IEEE_1394_CHILD_ID_DESCRIPTION {
WDF_CHILD_IDENTIFICATION_DESCRIPTION_HEADER IdHeader;
WCHAR VendorName[32];
WCHAR ModelName[32];
LONG UnitSpecId;
LONG UnitSoftwareVersion;
} IEEE_1394_CHILD_ID_DESCRIPTION, *PIEEE_1394_CHILD_ID_DESCRIPTION;
To set the IdentificationDescriptionSize member for this address descriptor, the driver can use the following code:
IEEE_1394_CHILD_ID_DESCRIPTION ID_Description;
WDF_CHILD_IDENTIFICATION_DESCRIPTION_HEADER_INIT(&ID_Description,
sizeof(ID_Description));
For more information about identification descriptions, see Dynamic Enumeration.
Requirements
Requirement | Value |
---|---|
Minimum KMDF version | 1.0 |
Header | wdfchildlist.h (include Wdf.h) |
See also
WDF_CHILD_ADDRESS_DESCRIPTION_HEADER