该对象代表线条和箭头格式。对于线条，
LineFormat 对象包含关于线条本身的格式信息；对于带有边框的图形，本对象包含该图形的边框的格式信息。
示例
使用 Line 属性可返回 LineFormat 对象。以下示例向 myDocument
中添加一条蓝色虚线。在该线条的起点处有一个短而窄的椭圆，在线条的终点处有一个长而宽的三角形。
| 示例代码 |
let myDocument = ActivePresentation.Slides.Item(1)
let line = myDocument.Shapes.AddLine(100, 100, 200, 300).Line
line.DashStyle = msoLineDashDotDot
line.ForeColor.RGB = (50, 0, 128)
line.BeginArrowheadLength = msoArrowheadShort
line.BeginArrowheadStyle = msoArrowheadOval
line.BeginArrowheadWidth = msoArrowheadNarrow
line.EndArrowheadLength = msoArrowheadLong
line.EndArrowheadStyle = msoArrowheadTriangle
line.EndArrowheadWidth = msoArrowheadWide
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