Paint out a polygon area with a user coordinates system.
| Call | DclShadeRegion | (X, y, [pattern], [icolor]) |
| X, y | < R (:) > | The peak coordinates (the user coordinates system) of a polygon. |
| Pattern | < I > | Painting out it it is a that pattern number. |
| icolor | <I> | Color Information (Packed RGB) |