The 'linetype' property

Integer Scalar

Valid for: Series

Normally, lines associated with a Series are drawn as a continuous (solid) line. If you wish, you can specify a different line type for the series, by assigning one of the following values to the linetype property:

1=Solid, 3=Dash, 4=Dot, 5=DashDot, 6=DashDotDot

Note: If the Chart's monochrome property is set to 1, and you haven't specified your own line type pattern, a default type from one of the above will be assigned to the Series object to distinguish it from other series on the chart.