If you use the following figure:

and you call the function using the following values:
| Parameter | Value |
|---|---|
| ptCenter | (144, 181) |
| nFading | 50 |
| uFadingRate | 33 |
| uWidth | 145 |
| uHeight | 181 |
| crVigColor | White |
| uFlags | VIG_ELLIPSE | VIG_FILLIN |
The following figure results:
