EraseRect
EraseRect Fill rectangle with background pattern
#include <Quickdraw.h> Quickdraw
void EraseRect(theRect );
Rect *theRect ; rectangle to erase
EraseRect fills a rectangle with the background pattern of the current
theRect is the address of an 8-byte Rect structure, in local coordinates.
Returns: none

Notes: EraseRect is functionally equivalent to:
FillRect( & theRect, thePort->bkPat );
The pen position is not changed by this function.
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.