返回或设置指定的直线端点处的箭头长度。MsoArrowheadLength 类型，可读写。
| MsoArrowheadLength 可为以下 MsoArrowheadLength 常量之一。 |
| msoArrowheadLengthMixed |
| msoArrowheadShort |
| msoArrowheadLengthMedium |
| msoArrowheadLong |
expression.BeginArrowheadLength
expression 必需。该表达式返回“应用于”列表中的对象之一。
本示例向 myDocument 中添加直线。该直线的起点是一个短而窄的椭圆，而该直线的终点则是一个长而宽的三角形。
Set myDocument = Worksheets(1)
With myDocument.Shapes.AddLine(100, 100, 200, 300).Line
.BeginArrowheadLength = msoArrowheadShort
.BeginArrowheadStyle = msoArrowheadOval
.BeginArrowheadWidth = msoArrowheadNarrow
.EndArrowheadLength = msoArrowheadLong
.EndArrowheadStyle = msoArrowheadTriangle
.EndArrowheadWidth = msoArrowheadWide
End With