#define LOCKF_LOGICAL_LOCK              0x00    // Bit 0 clear - logical lock
#define LOCKF_PHYSICAL_LOCK             0x01    // Bit 0 set - physical lock

/*
 * Message = WM_DEVICECHANGE
 * wParam  = DBT_NODISKSPACE
 * lParam  = drive number of drive that is out of disk space (1-based)
 *
 * Message issued by IFS manager when it detects that a drive is run out of
 * free space.
 */

#define DBT_NO_DISK_SPACE               0x0047

/*
 * Message = WM_DEVICECHANGE
 * wParam  = DBT_LOW_DISK_SPACE
 * lParam  = drive number of drive that is low on disk space (1-based)
 *
 * Message issued by VFAT when it detects that a drive it has mounted
 * has the remaning free space below a threshold specified by the
 * registry or by a disk space management application.
 * The broadcast is issued by VFAT ONLY when space is either allocated
 * or freed by VFAT.
 */

#define DBT_LOW_DISK_SPACE      0x0048

#define DBT_CONFIGMGPRIVATE             0x7FFF

/*
 * The following messages are for WM_DEVICECHANGE. The immediate list
 * is for the wParam. ALL THESE MESSAGES PASS A POINTER TO A STRUCT
 * STARTING WITH A DWORD SIZE AND HAVING NO POINTER IN THE STRUCT.
 *
 */
#define DBT_DEVICEARRIVAL               0x8000  // system detected a new device
#define DBT_DEVICEQUERYREMOVE           0x8001  // wants to remove, may fail
#define DBT_DEVICEQUERYREMOVEFAILED     0x8002  // removal aborted
#define DBT_DEVICEREMOVEPENDING         0x8003  // about to remove, still avail.
#define DBT_DEVICEREMOVECOMPLETE        0x8004  // device is gone
#define DBT_DEVICETYPESPECIFIC          0x8005  // type specific event
#if(WINVER >= 0x040A)
#define DBT_CUSTOMEVENT                 0x8006  // user-defined event
#endif /* WINVER >= 0x040A */

#define DBT_DEVTYP_OEM                  0x00000000  // oem-defined device type
#define DBT_DEVTYP_DEVNODE              0x00000001  // devnode number
#define DBT_DEVTYP_VOLUME               0x00000002  // logical volume
#define DBT_DEVTYP_PORT                 0x00000003  // serial, parallel
#define DBT_DEVTYP_NET                  0x00000004  // network resource

#if(WINVER >= 0x040A)
#define DBT_DEVTYP_DEVICEINTERFACE      0x00000005  // device interface class
#define DBT_DEVTYP_HANDLE               0x00000006  // file system handle
#endif /* WINVER >= 0x040A */

struct _DEV_BROADCAST_HEADER { /* */
    DWORD       dbcd_size;
    DWORD       dbcd_devicetype;
    DWORD       dbcd_reserved;
};

struct _DEV_BROADCAST_OEM {     /* */
    DWORD       dbco_size;
    DWORD       dbco_devicetype;
    DWORD       dbco_reserved;
    DWORD       dbco_identifier;
    DWORD       dbco_suppfunc;
};

typedef struct  _DEV_BROADCAST_OEM      DEV_BROADCAST_OEM;
typedef         DEV_BROADCAST_OEM       DBTFAR *PDEV_BROADCAST_OEM;

struct _DEV_BROADCAST_DEVNODE { /* */
    DWORD       dbcd_size;
    DWORD       dbcd_devicetype;
    DWORD       dbcd_reserved;
    DWORD       dbcd_devnode;
};

typedef struct  _DEV_BROADCAST_DEVNODE  DEV_BROADCAST_DEVNODE;
typedef         DEV_BROADCAST_DEVNODE   DBTFAR *PDEV_BROADCAST_DEVNODE;

struct _DEV_BROADCAST_VOLUME { /* */
    DWORD       dbcv_size;
    DWORD       dbcv_devicetype;
    DWORD       dbcv_reserved;
    DWORD       dbcv_unitmask;
    WORD        dbcv_flags;
};

typedef struct  _DEV_BROADCAST_VOLUME   DEV_BROADCAST_VOLUME;
typedef         DEV_BROADCAST_VOLUME    DBTFAR *PDEV_BROADCAST_VOLUME;

#define DBTF_MEDIA      0x0001          // media comings and goings
#define DBTF_NET        0x0002          // network volume

typedef struct _DEV_BROADCAST_PORT_A {
    DWORD       dbcp_size;
    DWORD       dbcp_devicetype;
    DWORD       dbcp_reserved;
    char        dbcp_name[1];
} DEV_BROADCAST_PORT_A, *PDEV_BROADCAST_PORT_A;

typedef struct _DEV_BROADCAST_PORT_W {
    DWORD       dbcp_size;
    DWORD       dbcp_devicetype;
    DWORD       dbcp_reserved;
    wchar_t     dbcp_name[1];
} DEV_BROADCAST_PORT_W, DBTFAR *PDEV_BROADCAST_PORT_W;

#ifdef UNICODE
typedef DEV_BROADCAST_PORT_W     DEV_BROADCAST_PORT;
typedef PDEV_BROADCAST_PORT_W    PDEV_BROADCAST_PORT;
#else
typedef DEV_BROADCAST_PORT_A     DEV_BROADCAST_PORT;
typedef PDEV_BROADCAST_PORT_A    PDEV_BROADCAST_PORT;
#endif

struct _DEV_BROADCAST_NET { /* */
    DWORD       dbcn_size;
    DWORD       dbcn_devicetype;
    DWORD       dbcn_reserved;
    DWORD       dbcn_resource;
    DWORD       dbcn_flags;
};

typedef struct  _DEV_BROADCAST_NET      DEV_BROADCAST_NET;
typedef         DEV_BROADCAST_NET       DBTFAR *PDEV_BROADCAST_NET;

#if(WINVER >= 0x040A)

typedef struct _DEV_BROADCAST_DEVICEINTERFACE_A {
    DWORD       dbcc_size;
    DWORD       dbcc_devicetype;
    DWORD       dbcc_reserved;
    GUID        dbcc_classguid;
    char        dbcc_name[1];
} DEV_BROADCAST_DEVICEINTERFACE_A, *PDEV_BROADCAST_DEVICEINTERFACE_A;

typedef struct _DEV_BROADCAST_DEVICEINTERFACE_W {
    DWORD       dbcc_size;
    DWORD       dbcc_devicetype;
    DWORD       dbcc_reserved;
    GUID        dbcc_classguid;
    wchar_t     dbcc_name[1];
} DEV_BROADCAST_DEVICEINTERFACE_W, *PDEV_BROADCAST_DEVICEINTERFACE_W;

#ifdef UNICODE
typedef DEV_BROADCAST_DEVICEINTERFACE_W   DEV_BROADCAST_DEVICEINTERFACE;
typedef PDEV_BROADCAST_DEVICEINTERFACE_W  PDEV_BROADCAST_DEVICEINTERFACE;
#else
typedef DEV_BROADCAST_DEVICEINTERFACE_A   DEV_BROADCAST_DEVICEINTERFACE;
typedef PDEV_BROADCAST_DEVICEINTERFACE_A  PDEV_BROADCAST_DEVICEINTERFACE;
#endif

typedef struct _DEV_BROADCAST_HANDLE {
    DWORD       dbch_size;
    DWORD       dbch_devicetype;
    DWORD       dbch_reserved;
    HANDLE      dbch_handle;     // file handle used in call to RegisterDeviceNotification
    HDEVNOTIFY  dbch_hdevnotify; // returned from RegisterDeviceNotification
    //
    // The following 3 fields are only valid if wParam is DBT_CUSTOMEVENT.
    //
    GUID        dbch_eventguid;
    LONG        dbch_nameoffset; // offset (bytes) of variable-length string buffer (-1 if none)
    BYTE        dbch_data[1];    // variable-sized buffer, potentially containing binary and/or text data
} DEV_BROADCAST_HANDLE, *PDEV_BROADCAST_HANDLE;

#if(WINVER >= 0x0501)

//
// Define 32-bit and 64-bit versions of the DEV_BROADCAST_HANDLE structure
// for WOW64.  These must be kept in sync with the above structure.
//

typedef struct _DEV_BROADCAST_HANDLE32 {
    DWORD       dbch_size;
    DWORD       dbch_devicetype;
    DWORD       dbch_reserved;
    ULONG32     dbch_handle;
    ULONG32     dbch_hdevnotify;
    GUID        dbch_eventguid;
    LONG        dbch_nameoffset;
    BYTE        dbch_data[1];
} DEV_BROADCAST_HANDLE32, *PDEV_BROADCAST_HANDLE32;

typedef struct _DEV_BROADCAST_HANDLE64 {
    DWORD       dbch_size;
    DWORD       dbch_devicetype;
    DWORD       dbch_reserved;
    ULONG64     dbch_handle;
    ULONG64     dbch_hdevnotify;
    GUID        dbch_eventguid;
    LONG        dbch_nameoffset;
    BYTE        dbch_data[1];
} DEV_BROADCAST_HANDLE64, *PDEV_BROADCAST_HANDLE64;

#endif /* WINVER >= 0x0501 */

#endif /* WINVER >= 0x040A */

#define DBTF_RESOURCE   0x00000001      // network resource
#define DBTF_XPORT      0x00000002      // new transport coming or going
#define DBTF_SLOWNET    0x00000004      // new incoming transport is slow
                                        // (dbcn_resource undefined for now)

#define DBT_VPOWERDAPI  0x8100          // VPOWERD API for Win95

/*
 *  User-defined message types all use wParam = 0xFFFF with the
 *  lParam a pointer to the structure below.
 *
 *  dbud_dbh - DEV_BROADCAST_HEADER must be filled in as usual.
 *
 *  dbud_szName contains a case-sensitive ASCIIZ name which names the
 *  message.  The message name consists of the vendor name, a backslash,
 *  then arbitrary user-defined ASCIIZ text.  For example:
 *
 *      "WidgetWare\QueryScannerShutdown"
 *      "WidgetWare\Video Q39S\AdapterReady"
 *
 *  After the ASCIIZ name, arbitrary information may be provided.
 *  Make sure that dbud_dbh.dbch_size is big enough to encompass
 *  all the data.  And remember that nothing in the structure may
 *  contain pointers.
 */

#define DBT_USERDEFINED 0xFFFF

struct _DEV_BROADCAST_USERDEFINED { /* */
    struct _DEV_BROADCAST_HDR dbud_dbh;
    char        dbud_szName[1];     /* ASCIIZ name */
/*  BYTE        dbud_rgbUserDefined[];*/ /* User-defined contents */
};


#endif  // _DBT_H