A shadow is attached within the box graph of x direction.
| Call | DclShadeXBoxArea | (X1, x2, y, [pattern1], [pattern2]) |
| X1, x2 | < R (:) > | The x coordinates value (the user coordinates) of both ends of a box graph. |
| Y | < R (:) > | The central y coordinates value (the user coordinates) of a box graph. |
| Pattern1 | < I > | The pattern number at the time of x1 < x2. |
| Pattern2 | < I > | The pattern number at the time of x1 > x2. |