Build 2.5.0.97 adds a couple more options when inserting pictures, namely :

- support for stretch option enumerator which allows to set how should the picture move and stretch according to column/row resizings. In Excel, this option can be found if you right-click on a picture, select "Format Picture..." and then select the "Properties" tab in the dialog. Default value is : move with cells, but no resize.
- support for the alternative text which allows to attach a string of text to a picture. In Excel, this option can be found if you right-click on a picture, select "Format Picture..." and then select the "Web" tab in the dialog.

Those properties are exposed in the IXlsPicture interface.

Of course, this works with both Excel 97-2003 and Excel 2007 spreadsheets.