Name
GrIntersectRegion -- Find the intersecting areas of two regions
Synopsis
void GrIntersectRegion (
  GR_REGION_ID dst_rgn,
  GR_REGION_ID src_rgn1,
  GR_REGION_ID src_rgn2
);
     Parameters
- dst_rgn
- A GR_REGION_ID region that will hold
             the intersection of src_rgn1 and
             src_rgn2. 
- src_rgn1
- The first of two regions to intersect. 
- src_rgn2
- The second of two regions to intersect. 
Description
The GrIntersectRegion function 
      intersects the area of two regions.