The MULBLANK record stores up to the equivalent of 256 BLANK records; the MULBLANK record is a file size optimization. The number of ixfe fields can be determined from the ColLast field and is equal to (colLast - colFirst + 1). The maximum length of the MULBLANK record is (256 x 2 + 10) = 522 bytes, because Microsoft Excel has at most 256 columns. Note that storing 256 blank cells in the MULBLANK record takes 522 bytes as compared with 2560 bytes for 256 BLANK records.
Record Data
Offset
Name
Size
Contents
4
rw
2
Row number (0-based)
6
colFirst
2
Column number (0-based) of the first column of the multiple RK record