BOF: Beginning of File (09h)

The BOF record marks the beginning of the workbook in the BIFF file. It also marks the beginning of record groups for sheets in the workbook. The record data has the following format.

Record Data

Offset
Name
Size
Contents
0 vers 2 Version number
2 dt 2 Substream type

Parameters

dt
The dt field specifies the type of the substream. Only worksheets and the workbook globals are supported.

0005h = Workbook Globals

0010h = Worksheet