Excel文件格式

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MICROSOFT EXCEL FILE FORMAT

Microsoft Excel is a popular spreadsheet. It uses a file format called BIFF (Binary File Format). There are many types of BIFF records. Each has a 4 byte header. The first two bytes are an opcode that specifies the record type. The second two bytes specify record length. Header values are stored in byte-reversed form (less significant byte first). The rest of the record is the data itself (Figure 2-1).
Figure 2-1. BIFF record header.

                |  Record Header    |  Record Body
Byte Number             |  0    1    2    3 |  0    1   ...
               -----------------------------------
Record Contents         | XX | XX | XX | XX | XX | XX | ...
               -----------------------------------
               | opcode   | length  | data

Each X represents a hexadecimal digit
Two X's form a byte. The least significant (low) byte of the opcode is byte 0 and the most significant (high) byte is byte 1. Similarly, the low byte of the record length field is byte 2 and the high byte is byte 3.

BOF (Beginning of File)
The first record in every spreadsheet is always of the BOF type (Figure 2-2).
Figure 2-2. BOF record.

          |  Record Header    |    Record Body    |
Byte       |  0    1    2    3 |  0    1    2    3 |
          -----------------------------------------
Contents   | 09 | 00 | 04 | 00 | 02 | 00 | 10 | 00 |
          -----------------------------------------
          | opcode  | length  | version |  file   |
          |         |         |  number |  type   |

The first two bytes, arranged with the low byte first, show that the opcode for BOF is 09h. The second two bytes indicate that the record body is 4 bytes long. The first two bytes of the body are the version number (2 for the initial version of Excel). The last two bytes are the file type. Type 10h is a worksheet file.

Relating Spreadsheet Cells to Record Data Bytes

A spreadsheet appears on a screen or printout as a matrix of rectangular cells. Each column is identified by a letter at its top, and each row is identified by a number.
Thus cell A1 is in the first column and the first row. Cell C240 is in the third column and the 240th row. This scheme identifies cells in a way easily understood by people.
However, it is not particularly convenient for computers, as they do not handle letters efficiently. They are best at dealing with binary numbers. Thus, Excel stores cell identifiers as binary numbers, that people can read as hexadecimal. The first number in the system is 0 rather than 1.
Figure 2-3, which shows the form of an INTEGER record, illustrates the storage of column and row information.
Figure 2-3. INTEGER record.

     |  Record Header    |  Record Body
Byte  |  0    1    2    3 |  0    1    2    3    4    5    6    7    8 |
     ------------------------------------------------------------------
Value | 02 | 00 | 09 | 00 | 00 | 00 | 02 | 00 | 00 | 00 | 00 | 39 | 00 |
     ------------------------------------------------------------------
     | opcode  | length  |   row   | column  |   rgbAttr    |    w    |

Opcode 2 indicates an integer record. The length bytes show that the record body is 9 bytes long. Row 0 in the body corresponds to spreadsheet row 1. Row 1 corresponds to
spreadsheet row 2, and so on. Column 2 corresponds to spreadsheet column C. Thus, Figure 2-3 deals with cell C1. The next three bytes, labeled "rgbAttr," specify cell attributes (Table 2-3). The final pair of bytes, (labeled "w") holds the integer's value. Here it is 39H or 57 decimal. Thus the record specifies that cell C1 of the spreadsheet contains an integer with the value 57.

Standard File Record Order
Excel worksheet files have each record type in a predetermined position. A file need not have all types, but the ones that are present are always be in the same order.
Table 2-1 lists the record types for Excel document (spreadsheet) files, in the order they would appear in a BIFF file. Table 2-2 lists the types in opcode order.
Several record types in a BIFF file, namely, ROW, BLANK, INTEGER, NUMBER, LABEL, BOOLERR, FORMULA, and COLUMN DEFAULT, describe the contents of a cell. These records
contain a 3 byte attribute field labeled "rgbAttr". The following table describes how the bits in the field correspond to cell attributes.
Table 2-1. Cell Attributes

Byte Offset     Bit   Description                     Contents
    0          7     Cell is not hidden              0b
                     Cell is hidden                  1b
               6     Cell is not locked              0b
                     Cell is locked                  1b
               5-0   Reserved, must be 0             000000b
               7-6   Font number (4 possible)
               5-0   Cell format code
    2          7     Cell is not shaded              0b
                     Cell is shaded                  1b
               6     Cell has no bottom border       0b
                     Cell has a bottom border        1b
               5     Cell has no top border          0b
                     Cell has a top border           1b
               4     Cell has no right border        0b
                     Cell has a right border         1b
               3     Cell has no left border         0b
                     Cell has a left border          1b
               2-0   Cell alignment code
                          general                    000b
                          left                       001b
                          center                     010b
                          right                      011b
                          fill                       100b
                          Multiplan default align.   111b

The font number field is a zero-based index into the document's table of fonts. the cell format code is a zero-based index into the document's table of picture formats.
There are 21 different standard formats. Additional custom formats may be defined by the user. See the FONT and FORMAT record descriptions form additonal details.
Table 2-2. Excel Record Type in Order of Appearance

Record Type                Opcode (Hexadecimal)
BOF                           09
FILEPASS                      2F
INDEX                         0B
CALCCOUNT                     0C
CALCMODE                      0D
PRECISION                     0E
REFMODE                       0F
DELTA                         10
ITERATION                     11
1904                          22
BACKUP                        40
PRINT ROW HEADERS             2A
PRINT GRIDLINES               2B
HORIZONTAL PAGE BREAKS        1B
VERTICAL PAGE BREAKS          1A
DEFAULT ROW HEIGHT            25
FONT                          31
FONT2                         32
HEADER                        14
FOOTER                        15
LEFT MARGIN                   26
RIGHT MARGIN                  27
TOP MARGIN                    28
BOTTOM MARGIN                 29
COLWIDTH                      24
EXTERNCOUNT                   16
EXTERNSHEET                   17
EXTERNNAME                    23
FORMATCOUNT                   1F
FORMAT                        1E
NAME                          18
DIMENSIONS                    00
COLUMN DEFAULT                20
ROW                           08
BLANK                         01
INTEGER                       02
NUMBER                        03
LABEL                         04
BOOLERR                       05
FORMULA                       06
ARRAY                         21
CONTINUE                      3C
STRING                        07
TABLE                         36
TABLE2                        37
PROTECT                       12
WINDOW PROTECT                19
PASSWORD                      13
NOTE                          1C
WINDOW1                       3D
WINDOW2                       3E
PANE                          41
SELECTION                     1D
EOF                           0A

Table 2-3. Excel Record Types in Opcode Order

Record Type             Opcode (hexadecimal)
DIMENSIONS                 00
BLANK                      01
INTEGER                    02
NUMBER                     03
LABEL                      04
BOOLERR                    05
FORMULA                    06
STRING                     07
ROW                        08
BOF                        09
EOF                        0A
INDEX                      0B
CALCCOUNT                  0C
CALCMODE                   0D
PRECISION                  0E
REFMODE                    0F
DELTA                      10
ITERATION                  11
PROTECT                    12
PASSWORD                   13
HEADER                     14
FOOTER                     15
EXTERNCOUNT                16
EXTERNSHEET                17
NAME                       18
WINDOW PROTECT             19
VERTICAL PAGE BREAKS       1A
HORIZONTAL PAGE BREAKS     1B
NOTE                       1C
SELECTION                  1D
FORMAT                     1E
FORMATCOUNT                1F
COLUMN DEFAULT             20
ARRAY                      21
1904                       22
EXTERNNAME                 23
COLWIDTH                   24
DEFAULT ROW HEIGHT         25
LEFT MARGIN                26
RIGHT MARGIN               27
TOP MARGIN                 28
BOTTOM MARGIN              29
PRINT ROW HEADERS          2A
PRINT GRIDLINES            2B
FILEPASS                   2F
FONT                       31
FONT2                      32
TABLE                      36
TABLE2                     37
CONTINUE                   3C
WINDOW1                    3D
WINDOW2                    3E
BACKUP                     40
PANE                       41

Worksheet Record Types in Opcode Order
The following section lists all record types in opcode order. It gives a specification and byte-by-byte breakdown of each type. Note that Excel terminology refers to spreadsheets or worksheets as "documents."
DIMENSIONS 00h 0d
Record Type: DIMENSIONS
Description: Entire dimensions or range of a spreadsheet
Record Body Length: 8 bytes
Record Body Byte Structure:

     Byte Number     Byte Description               Contents (hex)
          0-1        First row
          2-3        Last row plus 1
          4-5        First column
          6-7        Last column plus 1

Note: The last row and column in the record are both one greater than the highest numbered occupied ones.
BLANK 01h 1d
Record Type: BLANK
Description: Cell with no formula or value
Record Body Length: 7 bytes
Record Body Byte Structure:

     Byte Number     Byte Description               Contents (hex)
          0-1        Row
          2-3        Column
          4-6        Cell attributes (rgbAttr) (Table 2-3)

INTEGER 02h 2d
Record Type: INTEGER
Description: Constant unsigned integer
Record Body Length: 9 bytes
Record Body Byte Structure:

     Byte Number     Byte Description               Contents (hex)
          0-1        Row
          2-3        Column
          4-6        Cell attributes (rgbAttr) (Table 2-3)
          7-8        Unsigned integer value (w)

NUMBER 03h 3d
Record Type: NUMBER
Description: Constant floating point number
Record Body Length: 15 bytes
Record Body Byte Structure:

     Byte Number     Byte Description               Contents (hex)
          0-1        Row
          2-3        Column
          4-6        Cell attributes (rgbAttr) (Table 2-3)
          7-14       Floating point number value (IEEE format, see Appendix A)

LABEL 04h 4d
Record Type: LABEL
Description: Constant string
Record Body Length: 8 to 263 bytes
Record Body Byte Structure:

     Byte Number     Byte Description               Contents (hex)
          0-1        Row
          2-3        Column
          4-6        Cell attributes (rgbAttr) (Table 2-3)
          7          Length of string
          8-263      ASCII string, 0 to 255 bytes long

BOOLERR 05h 5d
Record Type: BOOLERR
Description: Boolean constant or error value
Record Body Length: 9 bytes
Record Body Byte Structure:

     Byte Number     Byte Description               Contents (hex)
          0-1        Row
          2-3        Column
          4-6        Cell attributes (rgbAttr) (Table 2-3)
          7          Boolean or error value
                               Boolean
                                     true                 1
                                     false                0
                               Error
                                     #NULL!               0
                                     #DIV/0!              7
                                     #VALUE!              0Fh
                                     #REF!                17h
                                     #NAME?               1Dh
                                     #NUM!                24h
                                     #N/A                 2Ah
          8          Specifies Boolean or error
                               Boolean                    0
                               Error                      1

FORMULA 06h 6d
Record Type: FORMULA
Description: Name, size, and contents of a formula cell
Record Body Length: 17-272 bytes
Record Body Byte Structure:

     Byte Number     Byte Description               Contents (hex)
          0-1        Row
          2-3        Column
          4-6        Cell attributes (rgbAttr) (see Table 2-3)
          7          Current value of formula (IEEE format, see Appendix A)
          15         Recalc flag
          16         Length of parsed expression
          17         Parsed expression

If a formula must be recalculated whenever it is loaded, the recalc flag (byte 15) must be set. Any nonzero value is a set recalc flag. However, a flag value of 3 indicates that the cell is a part of a matrix, and the entire matrix must be recalculated. Bytes 7 through 14 may contain a number, a Boolean value, an error code, or a string. The following tables apply.
Case 1: Bytes 7 - 14 contain a Boolean value.

    Byte Number     Byte Description          Contents (hex)
          7         otBool                          1
          8         Reserved                        0
          9         Boolean value
          10-12     Reserved                        0
          13-14     fExprO                          FFFFh

Case 2: Bytes 7 - 14 contain an error code.

    Byte Number     Byte Description          Contents (hex)
          7         otErr                           2
          8         Reserved                        0
          9         error code
          10-12     Reserved                        0
          13-14     fExprO                          FFFFh

Case 3: Bytes 7 - 14 contain a string.

    Byte Number     Byte Description          Contents (hex)
          7         otString                        0
          8-12      Reserved                        0
          13-14     fExprO                          FFFFh

The string value itself is not stored in the field, but rather in a separate record of the STRING type.
STRING 07h 7d
Record Type: STRING
Description: Value of a string in a formula
Record Body Length: variable
Record Body Byte Structure:

     Byte Number     Byte Description           Contents (hex)
          0          Length of the string
          1-256 (max) The string itself

The STRING record appears immediately after the FORMULA record that evaluates to the string, unless the formula is in an array. In that case, the string record immediately follows the ARRAY record.
ROW 08h 8d
Record Type: ROW
Description: Specifies a spreadsheet row
Record Body Length: 16 bytes
Record Body Byte Structure:

     Byte Number     Byte Description               Contents (hex)
          0-1        Row number
          2-3        First defined column in the row
          4-5        Last defined column in the row plus 1
          6-7        Row height
          8-9        RESERVED                                0
          10         Default cell attributes byte
                     Default attributes                      1
                     Not default attributes                  0
          11-12      Offset to cell records for this row
          13-15      Cell attributes (rgbAttr) (see Table 2-3)

BOF 09h 9d
Record Type: BOF
Description: Beginning of file
Record Body Length: 4 bytes
Record Body Byte Structure:

     Byte Number     Byte Description               Contents (hex)
          0-1        Version number
                          Excel                           2
                          Multiplan                       3
          2-3        Document type
                          worksheet                       10h
                          chart                           20h
                          macro sheet                     40h

If bit 8 of the version number byte pair is high (mask with 0100h to find out), the BIFF file is a Multiplan document.
EOF 0Ah 10d
Record Type: EOF
Description: End of file
Record Body Length: 0 bytes
The EOF record is the last one in a BIFF file. It always takes the form 0A000000h.
INDEX 0Bh 11d
Record Type: INDEX
Description: Contains pointers to other records in the BIFF file, and defines the range of rows used by the document. It is used to simplify searching a file for a particular cell or name.
Record Body Length: variable
Record Body Byte Structure:

     Byte Number     Byte Description               Contents (hex)
          0-3        Absolute file position of first NAME record
          4-5        First row that exists
          6-7        Last row that exists plus 1
          8-on       Array of absolute file positions of the
                     blocks of ROW records.

The INDEX record is optional. If present, it must immediately follow the FILEPASS record. IF there is no FILEPASS record, it must follow the BOF record.
CALCCOUNT 0Ch 12d
Record Type: CALCCOUNT
Description: Specifies the iteration count
Record Body Length: 2
Record Body Byte Structure:

     Byte Number     Byte Description               Contents (hex)
          0-1        Iteration Count

CALCMODE 0Dh 13d
Record Type: CALCMODE
Description: Specifies the calculation mode
Record Body Length: 2
Record Body Byte Structure:

     Byte Number     Byte Description               Contents (hex)
          0-1        Calculation mode
                       Manual                           0
                       Automatic                        1
                       Automatic, no tables            -1

PRECISION 0Eh 14d
Record Type: PRECISION
Description: Specifies precision of calculations for document
Record Body Length: 2
Record Body Byte Structure:

     Byte Number     Byte Description               Contents (hex)
          0-1        Document precision
                       precision as displayed           0
                       full precision                   1

REFMODE 0Fh 15d
Record Type: REFMODE
Description: Specifies location reference mode
Record Body Length: 2
Record Body Byte Structure:

     Byte Number     Byte Description            Contents (hex)
         0-1         Reference mode
                       R1C1 mode                      0
                       A1 mode                        1

DELTA 10h 16d
Record Type: DELTA
Description: Maximum change for an iterative model
Record Body Length: 8
Record Body Byte Structure:

     Byte Number           Byte Description      Contents (hex)
         0-7               Maximum change (IEEE format, see Appendix A)

ITERATION 11h 17d
Record Type: ITERATION
Description: Specifies whether iteration is on
Record Body Length: 2
Record Body Byte Structure:

     Byte Number           Byte Description         Contents (hex)
         0-1               Iteration flag
                             Iteration off               0
                             Iteration on                1

PROTECT 12h 18d
Record Type: PROTECT
Description: Specifies whether the document is protected with a document password
Record Body Length: 2
Record Body Byte Structure:

     Byte Number           Byte Description         Contents (hex)
         0-1               Document protection
                             Not protected               0
                             Protected                   1

PASSWORD 13h 19d
Record Type: PASSWORD
Description: Contains encrypted document password
Record Body Length: 2
Record Body Byte Structure:

     Byte Number           Byte Description         Contents (hex)
         0-1               Encrypted password

HEADER 14h 20d
Record Type: HEADER
Description: Specifies header string that appears at the top of every page when the document is printed
Record Body Length: variable
Record Body Byte Structure:

     Byte Number           Byte Description         Contents (hex)
          0                Length of string (bytes)
        1-on               Header string (ASCII)

FOOTER 15h 21d
Record Type: FOOTER
Description: Specifies footer string that appears at the bottom of every page when the document is printed
Record Body Length: variable
Record Body Byte Structure:

     Byte Number           Byte Description         Contents (hex)
         0                 Length of string (bytes)
       1-on                Footer string (ASCII)

EXTERNCOUNT 16h 22d
Record Type: EXTERNCOUNT
Description: Specifies the number of documents referenced externally by an Excel document
Record Body Length: 2
Record Body Byte Structure:

     Byte Number           Byte Description         Contents (hex)
         0-1               Number of externally referenced documents

EXTERNSHEET 17h 23d
Record Type: EXTERNSHEET
Description: Specifies a document that is referenced externally by the Excel file. There must be an EXTERNSHEET record for every external file counted by the EXTERNCOUNT record.
Record Body Length: variable
Record Body Byte Structure:

     Byte Number           Byte Description         Contents (hex)
          0                Length of document name
         1-on              Document name

The document name may be encoded. If so, its first character will be 0, 1 or 2.
0 indicates the document name is an external reference to an empty sheet.
1 indicates the document name has been translated to a less sys-tem-dependent name. This feature is valuable for documents intended for a non-DOS environment.
2 indicates that the externally referenced document is, in fact, the current document.
NAME 18h 24d
Record Type: NAME
Description: User-defined name on the document
Record Body Length: variable
Record Body Byte Structure:

     Byte Number           Byte Description              Contents (hex)
          0                Name attribute
                             Only bits 1 and 2 are ever nonzero.
                             Bit 1 is 1 if the name is a function or
                             command name on a macro sheet.
                             Bit 2 is 1 if the name definition
                             includes:
                             * A function that returns an array, such
                                as TREND or MINVERSE
                             * A ROW or COLUMN function
                             * A user-defined function
                           Name attribute
                             Meaningful only if bit 1 of
                             byte 0 is 1 (the name is a function or
                             command name).  Only bits 0 and 1 are  
                             ever nonzero.
                             Bit 0 is 1 if the name is a function.
                             Bit 1 is 1 if the name is a command.
          2                Keyboard shortcut.  Meaningful only if the  
                           name is a command.
                             If no keyboard shortcut     0
                             If shortcut exists          ASCII value
          3                Length of the name text
          4                Length of the name's definition
          5-?              Text of the name
          ?-?              Name's definition (parsed) in internal
                           compressed format
          ?                Length of the name's definition (duplicate)

All NAME records should appear together in a BIFF file.
WINDOW PROTECT 19h 25d
Record Type: WINDOW PROTECT
Description: Specifies whether a document's windows are protected
Record Body Length: 2 bytes
Record Body Byte Structure:

     Byte Number           Byte Description         Contents (hex)
         0-1               Window protect flag
                           Not protected                 0
                           Protected                     1

VERTICAL PAGE BREAKS 1Ah 26d
Record Type: VERTICAL PAGE BREAKS
Description: Lists all column page breaks
Record Body Length: variable
Record Body Byte Structure:

     Byte Number           Byte Description         Contents (hex)
         0-1               Number of page breaks
         2-on              Array containing a 2-byte integer for each
                           column that immediately follows a column page
                           break.  Columns must be sorted in ascending
                           order.

HORIZONTAL PAGE BREAKS 1Bh 27d
Record Type: HORIZONTAL PAGE BREAKS
Description: Lists all row page breaks
Record Body Length: variable
Record Body Byte Structure:

     Byte Number           Byte Description         Contents (hex)
         0-1               Number of page breaks
         2-on              Array containing a 2-byte integer for each row that immediately follows a row page
                           break.  Rows must be sorted in ascending
                           order.

NOTE 1Ch 28d
Record Type: NOTE
Description: Note associated with a cell
Record Body Length: Variable, maximum of 254
Record Body Byte Structure:

     Byte Number           Byte Description         Contents (hex)
         0-1               Row of the note
         2-3               Column of the note
         4-5               Length of the note part of the record
         6-on               Text of the note

Notes longer than 2048 characters must be split among multiple records. All except the last one will contain 2048 text characters. The last one will contain the overflow.
SELECTION 1Dh 29d
Record Type: SELECTION
Description: Specifies which cells are selected in a pane of a split window. It can also specify selected cells in a window that is not split.
Record Body Length: Variable
Record Body Byte Structure:

     Byte Number           Byte Description         Contents (hex)
          0                Number of pane
                             bottom right                0
                             top right                   1
                             bottom left                 2
                             top left                    3
                             no splits                   3
         1-2               Row number of the active cell
         3-4               Column number of the active cell
         5-6               Reference number of the active cell
         7-8               Number of references in the selection
         9-on              Array of references

Each reference in the array consists of 6 bytes arranged as follows:

     Byte Number           Byte Description
         0-1               First row in the reference
         2-3               Last row in the reference
          4                First column in the reference
          5                Last column in the reference

FORMAT 1Eh 30d
Record Type: FORMAT
Description: Describes a picture format in a document. All FORMAT records must appear together in a BIFF file.
Record Body Length: Variable
Record Body Byte Structure:

     Byte Number           Byte Description         Contents (hex)
          0                Length of format string
         1-on              Picture format string

FORMATCOUNT 1Fh 31d
Record Type: FORMATCOUNT
Description: The number of standard FORMAT records in the file. There are 21 different format records.
Record Body Length: 2 bytes
Record Body Byte Structure:

     Byte Number           Byte Description         Contents (hex)
         0-1               Number of built in format records.

COLUMN DEFAULT 20h 32d
Record Type: COLUMN DEFAULT
Description: Specifies default cell attributes for cells in a particular column. The default value is overriden for individual cells by a subsequent explicit definition.
Record Body Length: Variable
Record Body Byte Structure:

     Byte Number           Byte Description         Contents (hex)
         0-1               Column number of first column for which a default cell is being defined
         2-3               Column number of last column for which a default cell is being defined, plus 1.
         4-on              Array of cell attributes

ARRAY 21h 33d
Record Type: ARRAY
Description: Describes a formula entered into a range of cells as an array. Occurs immediately after the FORMULA record for the upper left corner of the array.
Record Body Length: variable
Record Body Byte Structure:

     Byte Number           Byte Description              Contents (hex)
         0-1               First row of the array
         2-3               Last row of the array
          4                First column of the array
          5                Last column of the array
          6                Recalculation flag
                             Array is calculated             0
                             Needs to be calculated         nonzero
          7                Length of parsed expression
         8-on              Parsed expression (array formula)

1904 22h 34d
Record Type: 1904
Description: Specifies date system used on this spreadsheet
Record Body Length: 2 bytes
Record Body Byte Structure:

     Byte Number           Byte Description              Contents (hex)
         0-1               Specifies date system used
                             1904 date system                 1
                             anything else                    0

EXTERNNAME 23h 35d
Record Type: EXTERNNAME
Description: An externally referenced name, referring to a work-sheet or macro sheet or to a DDE topic. All EXTERNNAME records associated with a supporting document must
directly follow its EXTERNSHEET record.
Record Body Length: Variable
Record Body Byte Structure:

     Byte Number           Byte Description         Contents (hex)
          0                Length of the name
         1-on              The name

When EXTERNNAME references a DDE topic, Excel may append its most recent values to the EXTERNNAME record. If the record becomes too long to be contained in a single record, it is split into multiple records, with CONTINUE records holding the excess.
COLWIDTH 24h 36d
Record Type: COLWIDTH
Description: Sets column width for a range of columns
Record Body Length: 3 bytes
Record Body Byte Structure:

     Byte Number           Byte Description         Contents (hex)
          0                First column in the range
          1                Last column in the range
         2-3               Column width in units of 1/256th of a character

DEFAULT ROW HEIGHT 25h 37d
Record Type: DEFAULT ROW HEIGHT
Description: Specifies the height of all rows that are not defined explicitly
Record Body Length: 2 bytes
Record Body Byte Structure:

     Byte Number           Byte Description         Contents  (hex)
         0-1               Default row height in units of 1/20th of a point

LEFT MARGIN 26h 38d
Record Type: LEFT MARGIN
Description: Specifies the left margin in inches when the document is printed
Record Body Length: 8 bytes
Record Body Byte Structure:

     Byte Number           Byte Description         Contents (hex)
         0-7               Left margin (IEEE format, see Appendix A)

RIGHT MARGIN 27h 39d
Record Type: RIGHT MARGIN
Description: Specifies the right margin in inches when the document is printed
Record Body Length: 8 bytes
Record Body Byte Structure:

     Byte Number           Byte Description         Contents (hex)
         0-7               Right margin (IEEE format, see Appendix A)

TOP MARGIN 28h 40d
Record Type: TOP MARGIN
Description: Specifies the top margin in inches when the document is printed
Record Body Length: 8 bytes
Record Body Byte Structure:

     Byte Number           Byte Description         Contents (hex)
         0-7               Top margin (IEEE format, see Appendix A)

BOTTOM MARGIN 29h 41d
Record Type: BOTTOM MARGIN
Description: Specifies the bottom margin in inches when the document is printed
Record Body Length: 8 bytes
Record Body Byte Structure:

     Byte Number           Byte Description         Contents (hex)
         0-7               Bottom margin (IEEE format, see Appendix A)

PRINT ROW HEADERS 2Ah 42d
Record Type: PRINT ROW HEADERS
Description: Flag determines whether to include row and column headers on printout of document
Record Body Length:
Record Body Byte Structure:

     Byte Number           Byte Description              Contents (hex)
         0-1               Row and Column Header Print Flag
                             Do not print headers             0
                             Print headers                    1

PRINT GRIDLINES 2Bh 43d
Record Type: PRINT GRIDLINES
Description: Flag determines whether to print gridlines on print-out of document
Record Body Length: 2
Record Body Byte Structure:

     Byte Number           Byte Description              Contents (hex)
         0-1               Gridline Print Flag
                             Do not print gridlines           0
                             Print gridlines                  1

FILEPASS 2Fh 47d
Record Type: FILEPASS
Description: Specifies a file password. If this record is present, the rest of the file is encrypted. The file password specified here is distinct from the document password
specified by the PASSWORD record. If present, the FILEPASS record must immediately follow the BOF record.
Record Body Length: ?
Record Body Byte Structure:

     Byte Number           Byte Description         Contents (hex)
         0-on              ?

FONT 31h 49d
Record Type: FONT
Description: Describes an entry in the document's font table. A document may have up to 4 different fonts, numbered 0 to 3. Font records are written in the font table in the
order in which they are encountered in the file.
Record Body Length: variable
Record Body Byte Structure:

     Byte Number           Byte Description              Contents (binary)
         0-1               Height of the font (in 1/20ths of a point)
         2-3               Font Attributes
                             First byte (reserved)             00000000b
                             Second byte
                               Bit 0 - bold                        1b
                               Bit 1 - italic                      1b
                               Bit 2 - underline                   1b
                               Bit 2 - strikeout                   1b
                               Bits 4-7 (reserved)               0000b
          4                Length of font name
         5-?               Font name

FONT2 32h 50d
Record Type: FONT2
Description: System specific information about the font defined in the previous FONT record. The FONT2 record is option-al.
Record Body Length: Variable
Record Body Byte Structure:

     Byte Number           Byte Description         Contents (hex)
         0-on              ?

TABLE 36h 54d
Record Type: TABLE
Description: Describes a one-input row or column table created through the Data Table command
Record Body Length: 12 bytes
Record Body Byte Structure:

     Byte Number           Byte Description              Contents (hex)
         0-1               First row of the table
         2-3               Last row of the table
          4                First column of the table
          5                Last column of the table
          6                Recalculation flag
                             Table is recalculated           0
                             Not recalculated              nonzero
          7                Row or column input table flag
                             Column input table              0
                             Row input table                 1
         8-9               Row of the input cell
         10-11             Column of the input cell

The area given by the first and last rows and columns does not include the outer row or column, which contains table formulas or input values. If the input cell is a deleted reference, the row of the input cell, given by the bytes at offset 8 and 9, is -1.
TABLE2 37h 55d
Record Type: TABLE2
Description: Describes a two-input table created by the Data Table command. It is the same as the TABLE record, except there is no distinction between a row input table and a
column input table, there are two input cells rather than one, and either may have a value of -1, indicating a deleted reference.
Record Body Length: 16 bytes
Record Body Byte Structure:

     Byte Number           Byte Description              Contents (hex)
         0-1               First row of the table
         2-3               Last row of the table
          4                First column of the table
          5                Last column of the table
          6                Recalculation flag
                             Table is calculated              0
                             Needs recalculation           nonzero
          7                RESERVED - must be zero            0
         8-9               Row of the row input cell
         10-11             Column of the row input cell
         12-13             Row of the column input cell
         14-15             Column of the column input cell

CONTINUE 3Ch 60d
Record Type: CONTINUE
Description: Continuation of FORMULA, ARRAY, or EXTERNNAME records that are too long to fit in a single record.
Record Body Length: variable
Record Body Byte Structure:

     Byte Number           Byte Description         Contents (hex)
         0-on              Parsed expression

WINDOW1 3Dh 61d
Record Type: WINDOW1
Description: Basic window information. Locations are relative to the upper left corner of the Microsoft Windows desktop, and are measured in units of 1/20th of a point.
Record Body Length: 9 bytes
Record Body Byte Structure:

     Byte Number           Byte Description              Contents (hex)
         0-1               Horizontal position of the window
         2-3               Vertical position of the window
         4-5               Width of the window
         6-7               Height of the window
          8               Hidden attribute
                            Window is not hidden             0
                            Window is hidden                 1

If you do not include a WINDOW1 record in your BIFF file, Excel will create a default
window in your document.
WINDOW2 3Eh 62d
Record Type: WINDOW2
Description: Advanced window information. The WINDOW2 record is optional. If present,
it must immediately follow the WINDOW1 record.
Record Body Length: 14 bytes
Record Body Byte Structure:

     Byte Number           Byte Description              Contents (hex)
          0                Display Formulas
                             Display values                   0
                             Display formulas                 1
          1                Display Grid
                             Do not display gridlines         0
                             Display gridlines                1
          2                Display Row and Column Headers
                             Do not display headers           0
                             Display headers
          3                Freeze window panes
                             Do not freeze panes              0
                             Freeze panes                     1
          4                Display zero values
                             Suppress display                 0
                             Display zero values              1
         5-6               Top row visible in the window
         7-8               Leftmost column visible in the window
          9                Row/column header and gridline color
                             Specified in next four bytes 0
                             Use window's default             1
                             foreground color.
         10-13             Row/column headers and gridline color (RGB)

BACKUP 40h 64d
Record Type: BACKUP
Description: Specifies whether a BIFF file should be backed up
Record Body Length: 2 bytes
Record Body Byte Structure:

     Byte Number           Byte Description         Contents (hex)
         0-1               Backup flag
                             Do not back up              0
                             Back up                     1

PANE 41h 65d
Record Type: PANE
Description: Describes the number and position of unfrozen panes in a window. Panes are created by horizontal and vertical splits, which are measured in units of 1/20th of a point.
Record Body Length: 9 bytes
Record Body Byte Structure:

     Byte Number           Byte Description         Contents (hex)
         0-1               Horizontal position of the split, zero if none
         2-3               Vertical position of the split, zero if none
         4-5               Top row visible in the bottom pane
         6-7               Leftmost column visible in the right pane
          8                Pane number of the active pane