The DEV_BROADCAST_HDR structure contains information about the device affected by a WM_DEVICECHANGE message.
typedef struct _DEV_BROADCAST_HDR {
ULONG dbch_size;
ULONG dbch_devicetype;
ULONG dbch_reserved;
} DEV_BROADCAST_HDR;
typedef DEV_BROADCAST_HDR *PDEV_BROADCAST_HDR;
Members
dbch_size
Size of this structure, in bytes.
dbch_devicetype
Type of device. Can be one of these values:
| Value | Meaning |
| DBT_DEVTYP_OEM | OEM- or IHV-defined device type. |
| DBT_DEVTYP_VOLUME | Logical volume. |
| DBT_DEVTYP_PORT | Port device (serial or parallel). |
dbch_reserved
Reserved; do not use.
See Also