Draws a Circle in an Area
Source position: agraphics.pas line 2185
function AreaCircle(  | 
Rp: PRastPort;  | 
xCenter: SmallInt;  | 
yCenter: SmallInt;  | 
r: SmallInt  | 
):LongWord;  | 
Rp  | 
  | 
A pointer to a RastPort  | 
xCenter  | 
  | 
X coordinate for center of Circle  | 
yCenter  | 
  | 
Y coordinate for center of Circle  | 
r  | 
  | 
Radius of Circle  | 
Calls AreaEllipse() with a = b = r