Draw line segment with an arrow with a user coordinates system.
| Call | DclDrawArrow | (X1, y1, x2, y2, [type], [index], [icolor]) |
| X1, y1 | < R > | The coordinates (the user coordinates) of initial point. |
| X2, y2 | < R > | The coordinates (the user coordinates) of a terminal. |
| Type | < I > | The line type of a line segment. |
| Index | < I > | Line index. |
| icolor | <I> | Color Information (Packed RGB) |