The VtPenJoin constants provide options for joining line segments in a series.
| Constant | Description |
| VtPenJoinMiter | The outer edges of the two lines are extended until they meet. |
| VtPenJoinRound | A circular arc is drawn around the point where the two lines meet. |
| VtPenJoinBevel | The notch between the ends of two joining lines is filled. |