How to set the line Weight in the Chart (OWC11)?

[pascal]

Does anu one knows how to set the line Weight in the series object in the
Chart of the OWC?

ChChart wc;
.....

Microsoft.Office.Interop.Owc11.ChSeries se;
se = wc.SeriesCollection.Add(0);
// Add data to Series

se.Line.Weight ?????