Needed to set the style of a line in Virtual Earth.

This seems to be a bit of a hidden function, so took a bit of work to find:

Usage: shape.Primitives[0].symbol.stroke_dashstyle = "Dot";

Other line types:

Solid, ShortDash, ShortDot, ShortDashDot, ShortDashDotDot, Dot, Dash, LongDash, DashDot, LongDashDot, LongDashDotDot