Hi Ms Benmessaoud,
This should be possible using "cross-tables" functionality of the output object:
outputObj.BeginTable( widthPercent of table, List<Double> widthsPercent of columns, BorderColor, BkColor, format, indent )
To create new table cells for this kind of table, you need to call the function
outputObj.TableCell( cell text value, rowSpan(int), colSpan(int), Font, FontSize, FontColor, BkColor, Shading, format, indent )
In your case, rowSpan is 5 (or 4) for the first 2 columns and 1 for all others.
This works for RTF and DOC output format, but not for PDF.
Best regards,
Torsten