// Valid only if ELEMENT_STATUS_PVOLTAG bit is set in Flags.
    //

    BYTE  PrimaryVolumeID[MAX_VOLUME_ID_SIZE];

    //
    // Alternate volume identification for the media.
    // Valid for two-sided media only, and pertains to the id. of the inverted side.
    // Valid only if ELEMENT_STATUS_AVOLTAG bit is set in Flags.
    //

    BYTE  AlternateVolumeID[MAX_VOLUME_ID_SIZE];
} CHANGER_ELEMENT_STATUS, *PCHANGER_ELEMENT_STATUS;

//
// Possible flag values
//

#define ELEMENT_STATUS_FULL      0x00000001 // Element contains a unit of media.
#define ELEMENT_STATUS_IMPEXP    0x00000002 // Media in i/e port was placed there by an operator.
#define ELEMENT_STATUS_EXCEPT    0x00000004 // Element is in an abnormal state; check ExceptionCode field for more information.
#define ELEMENT_STATUS_ACCESS    0x00000008 // Access to the i/e port from the medium changer is allowed.
#define ELEMENT_STATUS_EXENAB    0x00000010 // Export of media is supported.
#define ELEMENT_STATUS_INENAB    0x00000020 // Import of media is supported.

#define ELEMENT_STATUS_LUN_VALID 0x00001000 // Lun information is valid.
#define ELEMENT_STATUS_ID_VALID  0x00002000 // SCSI Id information is valid.
#define ELEMENT_STATUS_NOT_BUS   0x00008000 // Lun and SCSI Id fields are not on same bus as medium changer.
#define ELEMENT_STATUS_INVERT    0x00400000 // Media in element was inverted (valid only if ELEMENT_STATUS_SVALID bit is set)
#define ELEMENT_STATUS_SVALID    0x00800000 // SourceElementAddress field and ELEMENT_STATUS_INVERT bit are valid.

#define ELEMENT_STATUS_PVOLTAG   0x10000000 // Primary volume information is valid.
#define ELEMENT_STATUS_AVOLTAG   0x20000000 // Alternate volume information is valid.

//
// ExceptionCode values.
//

#define ERROR_LABEL_UNREADABLE    0x00000001 // Bar code scanner could not read bar code label.
#define ERROR_LABEL_QUESTIONABLE  0x00000002 // Label could be invalid due to unit attention condition.
#define ERROR_SLOT_NOT_PRESENT    0x00000004 // Slot is currently not addressable in the device.
#define ERROR_DRIVE_NOT_INSTALLED 0x00000008 // Drive is not installed.
#define ERROR_TRAY_MALFUNCTION    0x00000010 // Media tray is malfunctioning/broken.
#define ERROR_INIT_STATUS_NEEDED  0x00000011 // An Initialize Element Status command is needed.
#define ERROR_UNHANDLED_ERROR     0xFFFFFFFF // Unknown error condition


//
// Definitions for IOCTL_CHANGER_INITIALIZE_ELEMENT_STATUS
//

typedef struct _CHANGER_INITIALIZE_ELEMENT_STATUS {

    //
    // List describing the elements and range on which to initialize.
    //

    CHANGER_ELEMENT_LIST ElementList;

    //
    // Indicates whether a bar code scan should be used. Only applicable if
    // CHANGER_BAR_CODE_SCANNER_INSTALLED is set in Features0 of CHANGER_GET_PARAMETERS.
    //

    BOOLEAN BarCodeScan;
} CHANGER_INITIALIZE_ELEMENT_STATUS, *PCHANGER_INITIALIZE_ELEMENT_STATUS;


//
// Definitions for IOCTL_CHANGER_SET_POSITION
//

typedef struct _CHANGER_SET_POSITION {


    //
    // Indicates which transport to move.
    //

    CHANGER_ELEMENT Transport;

    //
    // Indicates the final destination of the transport.
    //

    CHANGER_ELEMENT Destination;

    //
    // Indicates whether the media currently carried by Transport, should be flipped.
    //

    BOOLEAN         Flip;
}CHANGER_SET_POSITION, *PCHANGER_SET_POSITION;


//
// Definitions for IOCTL_CHANGER_EXCHANGE_MEDIUM
//

typedef struct _CHANGER_EXCHANGE_MEDIUM {

    //
    // Indicates which transport to use for the exchange operation.
    //

    CHANGER_ELEMENT Transport;

    //
    // Indicates the source for the media that is to be moved.
    //

    CHANGER_ELEMENT Source;

    //
    // Indicates the final destination of the media originally at Source.
    //

    CHANGER_ELEMENT Destination1;

    //
    // Indicates the destination of the media moved from Destination1.
    //

    CHANGER_ELEMENT Destination2;

    //
    // Indicates whether the medium should be flipped.
    //

    BOOLEAN         Flip1;
    BOOLEAN         Flip2;
}CHANGER_EXCHANGE_MEDIUM, *PCHANGER_EXCHANGE_MEDIUM;


//
// Definitions for IOCTL_CHANGER_MOVE_MEDIUM
//

typedef struct _CHANGER_MOVE_MEDIUM {

    //
    // Indicates which transport to use for the move operation.
    //

    CHANGER_ELEMENT Transport;

    //
    // Indicates the source for the media that is to be moved.
    //

    CHANGER_ELEMENT Source;

    //
    // Indicates the destination of the media originally at Source.
    //

    CHANGER_ELEMENT Destination;

    //
    // Indicates whether the media should be flipped.
    //

    BOOLEAN         Flip;
}CHANGER_MOVE_MEDIUM, *PCHANGER_MOVE_MEDIUM;



//
// Definitions for IOCTL_QUERY_VOLUME_TAGS
//

//
// Input buffer.
//

typedef  struct _CHANGER_SEND_VOLUME_TAG_INFORMATION {

    //
    // Describes the starting element for which to return information.
    //

    CHANGER_ELEMENT StartingElement;

    //
    // Indicates the specific action to perform. See below.
    //

    DWORD ActionCode;

    //
    // Template used by the device to search for volume ids.
    //

    BYTE  VolumeIDTemplate[MAX_VOLUME_TEMPLATE_SIZE];
} CHANGER_SEND_VOLUME_TAG_INFORMATION, *PCHANGER_SEND_VOLUME_TAG_INFORMATION;


//
// Output buffer.
//

typedef struct _READ_ELEMENT_ADDRESS_INFO {

    //
    // Number of elements matching criteria set forth by ActionCode.
    //

    DWORD NumberOfElements;

    //
    // Array of CHANGER_ELEMENT_STATUS structures, one for each element that corresponded
    // with the information passed in with the CHANGER_SEND_VOLUME_TAG_INFORMATION structure.
    //

    CHANGER_ELEMENT_STATUS ElementStatus[1];
} READ_ELEMENT_ADDRESS_INFO, *PREAD_ELEMENT_ADDRESS_INFO;

//
// Possible ActionCode values. See Features0 of CHANGER_GET_PARAMETERS for compatibility with
// the current device.
//

#define SEARCH_ALL         0x0 // Translate - search all defined volume tags.
#define SEARCH_PRIMARY     0x1 // Translate - search only primary volume tags.
#define SEARCH_ALTERNATE   0x2 // Translate - search only alternate volume tags.
#define SEARCH_ALL_NO_SEQ  0x4 // Translate - search all defined volume tags but ignore sequence numbers.
#define SEARCH_PRI_NO_SEQ  0x5 // Translate - search only primary volume tags but ignore sequence numbers.
#define SEARCH_ALT_NO_SEQ  0x6 // Translate - search only alternate volume tags but ignore sequence numbers.

#define ASSERT_PRIMARY     0x8 // Assert - as the primary volume tag - if tag now undefined.
#define ASSERT_ALTERNATE   0x9 // Assert - as the alternate volume tag - if tag now undefined.

#define REPLACE_PRIMARY    0xA // Replace - the primary volume tag - current tag ignored.
#define REPLACE_ALTERANTE  0xB // Replace - the alternate volume tag - current tag ignored.

#define UNDEFINE_PRIMARY   0xC // Undefine - the primary volume tag - current tag ignored.
#define UNDEFINE_ALTERNATE 0xD // Undefine - the alternate volume tag - current tag ignored.



#define IOCTL_SERIAL_LSRMST_INSERT      CTL_CODE(FILE_DEVICE_SERIAL_PORT,31,METHOD_BUFFERED,FILE_ANY_ACCESS)


//
// The following values follow the escape designator in the
// data stream if the LSRMST_INSERT mode has been turned on.
//
#define SERIAL_LSRMST_ESCAPE     ((BYTE )0x00)

//
// Following this value is the contents of the line status
// register, and then the character in the RX hardware when
// the line status register was encountered.
//
#define SERIAL_LSRMST_LSR_DATA   ((BYTE )0x01)

//
// Following this value is the contents of the line status
// register.  No error character follows
//
#define SERIAL_LSRMST_LSR_NODATA ((BYTE )0x02)

//
// Following this value is the contents of the modem status
// register.
//
#define SERIAL_LSRMST_MST        ((BYTE )0x03)


#ifndef _FILESYSTEMFSCTL_
#define _FILESYSTEMFSCTL_

//
// The following is a list of the native file system fsctls followed by
// additional network file system fsctls.  Some values have been
// decommissioned.
//

#define FSCTL_REQUEST_OPLOCK_LEVEL_1    CTL_CODE(FILE_DEVICE_FILE_SYSTEM,  0, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define FSCTL_REQUEST_OPLOCK_LEVEL_2    CTL_CODE(FILE_DEVICE_FILE_SYSTEM,  1, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define FSCTL_REQUEST_BATCH_OPLOCK      CTL_CODE(FILE_DEVICE_FILE_SYSTEM,  2, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define FSCTL_OPLOCK_BREAK_ACKNOWLEDGE  CTL_CODE(FILE_DEVICE_FILE_SYSTEM,  3, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define FSCTL_OPBATCH_ACK_CLOSE_PENDING CTL_CODE(FILE_DEVICE_FILE_SYSTEM,  4, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define FSCTL_OPLOCK_BREAK_NOTIFY       CTL_CODE(FILE_DEVICE_FILE_SYSTEM,  5, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define FSCTL_LOCK_VOLUME               CTL_CODE(FILE_DEVICE_FILE_SYSTEM,  6, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define FSCTL_UNLOCK_VOLUME             CTL_CODE(FILE_DEVICE_FILE_SYSTEM,  7, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define FSCTL_DISMOUNT_VOLUME           CTL_CODE(FILE_DEVICE_FILE_SYSTEM,  8, METHOD_BUFFERED, FILE_ANY_ACCESS)
// decommissioned fsctl value                                              9
#define FSCTL_IS_VOLUME_MOUNTED         CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 10, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define FSCTL_IS_PATHNAME_VALID         CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 11, METHOD_BUFFERED, FILE_ANY_ACCESS) // PATHNAME_BUFFER,
#define FSCTL_MARK_VOLUME_DIRTY         CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 12, METHOD_BUFFERED, FILE_ANY_ACCESS)
// decommissioned fsctl value                                             13
#define FSCTL_QUERY_RETRIEVAL_POINTERS  CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 14,  METHOD_NEITHER, FILE_ANY_ACCESS)
#define FSCTL_GET_COMPRESSION           CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 15, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define FSCTL_SET_COMPRESSION           CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 16, METHOD_BUFFERED, FILE_READ_DATA | FILE_WRITE_DATA)
// decommissioned fsctl value                                             17
// decommissioned fsctl value                                             18
#define FSCTL_MARK_AS_SYSTEM_HIVE       CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 19,  METHOD_NEITHER, FILE_ANY_ACCESS)
#define FSCTL_OPLOCK_BREAK_ACK_NO_2     CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 20, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define FSCTL_INVALIDATE_VOLUMES        CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 21, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define FSCTL_QUERY_FAT_BPB             CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 22, METHOD_BUFFERED, FILE_ANY_ACCESS) // , FSCTL_QUERY_FAT_BPB_BUFFER
#define FSCTL_REQUEST_FILTER_OPLOCK     CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 23, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define FSCTL_FILESYSTEM_GET_STATISTICS CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 24, METHOD_BUFFERED, FILE_ANY_ACCESS) // , FILESYSTEM_STATISTICS
#if(_WIN32_WINNT >= 0x0400)
#define FSCTL_GET_NTFS_VOLUME_DATA      CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 25, METHOD_BUFFERED, FILE_ANY_ACCESS) // , NTFS_VOLUME_DATA_BUFFER
#define FSCTL_GET_NTFS_FILE_RECORD      CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 26, METHOD_BUFFERED, FILE_ANY_ACCESS) // NTFS_FILE_RECORD_INPUT_BUFFER, NTFS_FILE_RECORD_OUTPUT_BUFFER
#define FSCTL_GET_VOLUME_BITMAP         CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 27,  METHOD_NEITHER, FILE_ANY_ACCESS) // STARTING_LCN_INPUT_BUFFER, VOLUME_BITMAP_BUFFER
#define FSCTL_GET_RETRIEVAL_POINTERS    CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 28,  METHOD_NEITHER, FILE_ANY_ACCESS) // STARTING_VCN_INPUT_BUFFER, RETRIEVAL_POINTERS_BUFFER
#define FSCTL_MOVE_FILE                 CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 29, METHOD_BUFFERED, FILE_ANY_ACCESS) // MOVE_FILE_DATA,
#define FSCTL_IS_VOLUME_DIRTY           CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 30, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define FSCTL_GET_HFS_INFORMATION       CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 31, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define FSCTL_ALLOW_EXTENDED_DASD_IO    CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 32, METHOD_NEITHER,  FILE_ANY_ACCESS)
#endif /* _WIN32_WINNT >= 0x0400 */

#if(_WIN32_WINNT >= 0x0500)
#define FSCTL_READ_PROPERTY_DATA        CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 33, METHOD_NEITHER, FILE_ANY_ACCESS)
#define FSCTL_WRITE_PROPERTY_DATA       CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 34, METHOD_NEITHER, FILE_ANY_ACCESS)
#define FSCTL_FIND_FILES_BY_SID         CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 35, METHOD_NEITHER, FILE_ANY_ACCESS)
// decommissioned fsctl value                                             36
#define FSCTL_DUMP_PROPERTY_DATA        CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 37,  METHOD_NEITHER, FILE_ANY_ACCESS)
#define FSCTL_SET_OBJECT_ID             CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 38, METHOD_BUFFERED, FILE_WRITE_DATA) // FILE_OBJECTID_BUFFER
#define FSCTL_GET_OBJECT_ID             CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 39, METHOD_BUFFERED, FILE_ANY_ACCESS) // , FILE_OBJECTID_BUFFER
#define FSCTL_DELETE_OBJECT_ID          CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 40, METHOD_BUFFERED, FILE_WRITE_DATA)
#define FSCTL_SET_REPARSE_POINT         CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 41, METHOD_BUFFERED, FILE_WRITE_DATA) // REPARSE_DATA_BUFFER,
#define FSCTL_GET_REPARSE_POINT         CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 42, METHOD_BUFFERED, FILE_ANY_ACCESS) // , REPARSE_DATA_BUFFER
#define FSCTL_DELETE_REPARSE_POINT      CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 43, METHOD_BUFFERED, FILE_WRITE_DATA) // REPARSE_DATA_BUFFER,
#define FSCTL_ENUM_USN_DATA             CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 44,  METHOD_NEITHER, FILE_READ_DATA)  // MFT_ENUM_DATA,
#define FSCTL_SECURITY_ID_CHECK         CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 45,  METHOD_NEITHER, FILE_READ_DATA)  // BULK_SECURITY_TEST_DATA,
#define FSCTL_READ_USN_JOURNAL          CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 46,  METHOD_NEITHER, FILE_READ_DATA)  // READ_USN_JOURNAL_DATA, USN
#define FSCTL_SET_OBJECT_ID_EXTENDED    CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 47, METHOD_BUFFERED, FILE_WRITE_DATA)
#define FSCTL_CREATE_OR_GET_OBJECT_I