The Microsoft Excel File Format - OpenOffice.org

5 Worksheet/Workbook Records
5.51 GCW – Global Column Width
BIFF2 BIFF3 BIFF4 BIFF5 BIFF8
— — 00AB H 00AB H —
This record contains a bitfield with one bit for every column in the worksheet, describing how to set the column width
for the respective column. If this record is omitted, all columns are using the default column width.
Record GCW, BIFF4-BIFF5:
Offset Size Contents
0 2 Size of the following bitfield (in bytes, always 0020 H )
2 32 Bit field with one bit for every column in the worksheet. The first byte of the bitfield
contains flags for the first 8 columns (A to H), the second byte for the next 8 columns and
so on. Bit 0 (mask 0x01) of each byte is for the leftmost column in the column interval,
bit 7 (mask 0x80) is for the rightmost column.
If a bit is set, the corresponding column uses the width set in the STANDARDWIDTH
record (➜5.101). If a bit is cleared, the corresponding column uses the width set in the
COLINFO record (➜5.18) for this column.
If a bit is set, and the worksheet does not contain the STANDARDWIDTH record, or if the
bit is cleared, and the worksheet does not contain the COLINFO record, the DEFCOL-
WIDTH record (➜5.32) of the worksheet will be used instead.
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