Draw error bar of x direction.
| Call | DclDrawXErrorBar | (X1, x2, y, [type], [index], [width]) |
| X1, x2 | < R (:) > | The x coordinates value (the user coordinates) of both ends of an error bar. |
| Y | < R (:) > | The y coordinates value (the user coordinates) of an error bar. |
| Type | < I > | The line type of an error bar. |
| Index | < I > | The line index of an error bar. |
| Width | < I > | The width (the regular coordinates system) of an error bar. |