Build 2.9.0.42 of xlsgen adds alternative text to drawing objects such as text boxes, chart text boxes, comments and charts.

The alternative text is what appears in the Web tab of a drawing object, when you right-click on its Properties in Excel.

In xlsgen, so far alternative text was only supported for pictures (IXlsPicture).

Now it's added to the following interfaces : IXlsTextBox, IXlsChartTextBox, IXlsComment, IXlsChart.