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FCIRCLE()                                                           G_EXAM02
   Draws a circle with a given center and radius.

   Syntax
         FCIRCLE(nX,nY,nRadius,nColor)

   Arguments
         nX          Sets the absolute horizontal screen position.
         nY          Sets the absolute vertical screen position.
         nRadius     Sets the radius.
         nColor      Sets the palette color number.

   Returns
         None

   Note: ATX() and ATY() can be used to position the circle.

   Description
         Draws a circle with a given center and radius. This function
         adjusts for the screen aspect ratio to draw a figure that appears
         to be a circle. The radius is assumed to be positive and along
         the X-axis.

         FLP_CAP can be used in place of nX,nY to draw at the current active
         point.