Hi, Since I didn't find anything on the 0x17-0x24 formats, I've studied a little the binary headers of a french and english Excel file (.xls) (See attachment for the headers).
As you can see, the red underlined chars specify the formats code (0x17-0x24) but I'm not sure of that and I'm searching for some confimations... The green underlined chars represents the length of the format. Example (1st french format): - code: 0x001C - length: 0x0017 (23 chars) - string: #,##0\ "F";\-#,##0\ "F" Waiting for comments, ideas... Loic
POI French.gif
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POI english.gif
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