InvertRoundRect
InvertRoundRect Invert all pixels in a round-corner rectangle
#include <Quickdraw.h> Quickdraw
void InvertRoundRect( theRect, ovalWidth, ovalHeight );
Rect *theRect ; rectangle defining position and size
short ovalWidth ; width and . . .
short ovalHeight ; height defining curvature of corners
InvertRoundRect inverts all pixels enclosed by a rounded-corner
rectangle. All black pixels are set to white and vice versa.
theRect is the address of an 8-byte Rect structure, in local coordinates.
ovalWidth and . . .
ovalHeight specify the curvature of the corners. Small values make sharper
corners; large values specify more "rounding". See
FrameRoundRect for examples.
Returns: none

Notes: For "old model" color, the output result of all Invertxxx functions
depends upon the device being used.
InvertRoundRect doesn't change the pen position.
As with all Quickdraw drawing, the output is clipped to the intersection of
the current GrafPort's bitMap boundary rectangle, the port rectangle,
clipping region, and visible region.