BcdElementType structure

Describes the layout of the BCD element types.

Syntax

typedef struct {
  union {
    ULONG  PackedValue;
    struct {
      ULONG SubType  :24;
      ULONG Format  :4;
      ULONG Class  :4;
    };
  };
} BcdElementType;

Members

PackedValue

SubType

Class-specific subtype for the data. The valid values differ based on class.

Format

Describes the data format for elements of this type.

Value	Meaning
Device 0x1	A boot environment device, represented as a GUID in string format. For example "{500ec897-0b25-449a-8ecd-8d81628baa9c}".
String 0x2	A NULL-terminated Unicode string.
Object 0x3	A GUID in string format.
ObjectList 0x4	An array of GUIDs.
Integer 0x5	A 64-bit integer.
Boolean 0x6	A boolean.
IntegerList 0x7	An array of 64-bit integers.

Class

Describes the consumer of the element type.

Value	Meaning
Library 0x1	Element types that span both applications and devices. Elements of this class can only contain other Library class BCD elements.
Application 0x2	Element types specific to a boot applications.
Device 0x3	Element types specific to a boot device.
OEM 0x5	Element types specific to an Original Equipment Manufacturer (OEM).

Requirements

See also

BcdBootMgrElementTypes

BcdDeviceObjectElementTypes

BcdLibraryElementTypes

BcdMemDiagElementTypes

BcdOSLoaderElementTypes