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Dbt.h：源码内容
							/*****************************************************************************
 *
 *  (C) Copyright MICROSOFT Corp., 1993-1999
 *
 *  Title:      DBT.H - Equates for WM_DEVICECHANGE and BroadcastSystemMessage
 *
 *  Version:    4.00
 *
 *  Date:       24-May-1993
 *
 *  Author:     rjc
 *
 *----------------------------------------------------------------------------
 *
 *  Change log:
 *
 *     DATE     REV                 DESCRIPTION
 *  ----------- --- ----------------------------------------------------------
 *
 *****************************************************************************/
#ifndef _DBT_H
#define _DBT_H
#if _MSC_VER > 1000
#pragma once
#endif
/*
 * BroadcastSpecialMessage constants.
 */
#define WM_DEVICECHANGE         0x0219
/* XLATOFF */
#ifdef  IS_32
#define DBTFAR
#else
#define DBTFAR  far
#endif
/* XLATON */
#if !defined(_WCHAR_T_DEFINED) && !defined(_NATIVE_WCHAR_T_DEFINED)
typedef unsigned short wchar_t;
#define _WCHAR_T_DEFINED
#endif
#ifndef GUID_DEFINED
#include <guiddef.h>
#endif // !defined(GUID_DEFINED)
/*
 * Broadcast message and receipient flags.
 *
 * Note that there is a third "flag". If the wParam has:
 *
 * bit 15 on:   lparam is a pointer and bit 14 is meaningfull.
 * bit 15 off:  lparam is just a UNLONG data type.
 *
 * bit 14 on:   lparam is a pointer to an ASCIIZ string.
 * bit 14 off:  lparam is a pointer to a binary struture starting with
 *              a dword describing the length of the structure.
 */
#define BSF_QUERY               0x00000001
#define BSF_IGNORECURRENTTASK   0x00000002      /* Meaningless for VxDs */
#define BSF_FLUSHDISK           0x00000004      /* Shouldn't be used by VxDs */
#define BSF_NOHANG              0x00000008
#define BSF_POSTMESSAGE         0x00000010
#define BSF_FORCEIFHUNG         0x00000020
#define BSF_NOTIMEOUTIFNOTHUNG  0x00000040
#define BSF_MSGSRV32ISOK        0x80000000      /* Called synchronously from PM API */
#define BSF_MSGSRV32ISOK_BIT    31              /* Called synchronously from PM API */
#define BSM_ALLCOMPONENTS       0x00000000
#define BSM_VXDS                0x00000001
#define BSM_NETDRIVER           0x00000002
#define BSM_INSTALLABLEDRIVERS  0x00000004
#define BSM_APPLICATIONS        0x00000008
/*
 * Message = WM_DEVICECHANGE
 * wParam  = DBT_APPYBEGIN
 * lParam  = (not used)
 *
 *      'Appy-time is now available.  This message is itself sent
 *      at 'Appy-time.
 *
 * Message = WM_DEVICECHANGE
 * wParam  = DBT_APPYEND
 * lParam  = (not used)
 *
 *      'Appy-time is no longer available.  This message is *NOT* sent
 *      at 'Appy-time.  (It cannot be, because 'Appy-time is gone.)
 *
 * NOTE!  It is possible for DBT_APPYBEGIN and DBT_APPYEND to be sent
 * multiple times during a single Windows session.  Each appearance of
 * 'Appy-time is bracketed by these two messages, but 'Appy-time may
 * momentarily become unavailable during otherwise normal Windows
 * processing.  The current status of 'Appy-time availability can always
 * be obtained from a call to _SHELL_QueryAppyTimeAvailable.
 */
#define DBT_APPYBEGIN                   0x0000
#define DBT_APPYEND                     0x0001
/*
 * Message = WM_DEVICECHANGE
 * wParam  = DBT_DEVNODES_CHANGED
 * lParam  = 0
 *
 *      send when configmg finished a process tree batch. Some devnodes
 *      may have been added or removed. This is used by ring3 people which
 *      need to be refreshed whenever any devnode changed occur (like
 *      device manager). People specific to certain devices should use
 *      DBT_DEVICE* instead.
 */
#define DBT_DEVNODES_CHANGED            0x0007
/*
 * Message = WM_DEVICECHANGE
 * wParam  = DBT_QUERYCHANGECONFIG
 * lParam  = 0
 *
 *      sent to ask if a config change is allowed
 */
#define DBT_QUERYCHANGECONFIG           0x0017
/*
 * Message = WM_DEVICECHANGE
 * wParam  = DBT_CONFIGCHANGED
 * lParam  = 0
 *
 *      sent when a config has changed
 */
#define DBT_CONFIGCHANGED               0x0018
/*
 * Message = WM_DEVICECHANGE
 * wParam  = DBT_CONFIGCHANGECANCELED
 * lParam  = 0
 *
 *      someone cancelled the config change
 */
#define DBT_CONFIGCHANGECANCELED        0x0019
/*
 * Message = WM_DEVICECHANGE
 * wParam  = DBT_MONITORCHANGE
 * lParam  = new resolution to use (LOWORD=x, HIWORD=y)
 *           if 0, use the default res for current config
 *
 *      this message is sent when the display monitor has changed
 *      and the system should change the display mode to match it.
 */
#define DBT_MONITORCHANGE               0x001B
/*
 * Message = WM_DEVICECHANGE
 * wParam  = DBT_SHELLLOGGEDON
 * lParam  = 0
 *
 *      The shell has finished login on: VxD can now do Shell_EXEC.
 */
#define DBT_SHELLLOGGEDON               0x0020
/*
 * Message = WM_DEVICECHANGE
 * wParam  = DBT_CONFIGMGAPI
 * lParam  = CONFIGMG API Packet
 *
 *      CONFIGMG ring 3 call.
 */
#define DBT_CONFIGMGAPI32               0x0022
/*
 * Message = WM_DEVICECHANGE
 * wParam  = DBT_VXDINITCOMPLETE
 * lParam  = 0
 *
 *      CONFIGMG ring 3 call.
 */
#define DBT_VXDINITCOMPLETE             0x0023
/*
 * Message = WM_DEVICECHANGE
 * wParam  = DBT_VOLLOCK*
 * lParam  = pointer to VolLockBroadcast structure described below
 *
 *      Messages issued by IFSMGR for volume locking purposes on WM_DEVICECHANGE.
 *      All these messages pass a pointer to a struct which has no pointers.
 */
#define DBT_VOLLOCKQUERYLOCK    0x8041
#define DBT_VOLLOCKLOCKTAKEN    0x8042
#define DBT_VOLLOCKLOCKFAILED   0x8043
#define DBT_VOLLOCKQUERYUNLOCK  0x8044
#define DBT_VOLLOCKLOCKRELEASED 0x8045
#define DBT_VOLLOCKUNLOCKFAILED 0x8046
/*
 * Device broadcast header
 */
struct _DEV_BROADCAST_HDR {     /* */
    DWORD       dbch_size;
    DWORD       dbch_devicetype;
    DWORD       dbch_reserved;
};
typedef struct  _DEV_BROADCAST_HDR      DEV_BROADCAST_HDR;
typedef         DEV_BROADCAST_HDR       DBTFAR *PDEV_BROADCAST_HDR;
/*
 * Structure for volume lock broadcast
 */
typedef struct VolLockBroadcast VolLockBroadcast;
typedef VolLockBroadcast *pVolLockBroadcast;
struct VolLockBroadcast {
        struct  _DEV_BROADCAST_HDR vlb_dbh;
        DWORD   vlb_owner;              // thread on which lock request is being issued
        BYTE    vlb_perms;              // lock permission flags defined below
        BYTE    vlb_lockType;           // type of lock
        BYTE    vlb_drive;              // drive on which lock is issued
        BYTE    vlb_flags;              // miscellaneous flags
};
/*
 * Values for vlb_perms
 */
#define LOCKP_ALLOW_WRITES              0x01    // Bit 0 set - allow writes
#define LOCKP_FAIL_WRITES               0x00    // Bit 0 clear - fail writes
#define LOCKP_FAIL_MEM_MAPPING          0x02    // Bit 1 set - fail memory mappings
#define LOCKP_ALLOW_MEM_MAPPING         0x00    // Bit 1 clear - allow memory mappings
#define LOCKP_USER_MASK                 0x03    // Mask for user lock flags
#define LOCKP_LOCK_FOR_FORMAT           0x04    // Level 0 lock for format
/*
 * Values for vlb_flags
 */
#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:
 *
 *      "WidgetWareQueryScannerShutdown"
 *      "WidgetWareVideo Q39SAdapterReady"
 *
 *  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

						