Not easily. I tried this once by using drawing multiple circles from radius 1 up to the radius I wanted. Unfortunately, due to precision issues there were some pixels that never got drawn. You might try a blur on the bitmap but that really takes CPU cycles. Or used dbDot() to fill it in.
Ultimately I covered the issue by creating my own Image class which directly manipulates the Direct X image and wrote my own circle and ellipse routines that optionally fill the primitive.
Lilith, Night Butterfly
I'm not a programmer but I play one in the office