I hv been working on a Office 2007 App level add-in project using VS2005,
..Net 2.0, VSTO for Office 2007 and Office 2007 Interopps. I want to draw a
XYScatter chart with smooth lines nad no markers.

Why, even if we set the ChartType to xlXYScatterSmoothNoMarkers you get
markers?
xlChart.ChartType =
Microsoft.Office.Interop.Excel.XlChartType.xlXYSca tterSmoothNoMarkers;

Is there any way to change XYScatter line thickness?