Region::Complement(constRect&) method (gdiplusheaders.h)

The Region::Complement method updates this region to the portion of the specified rectangle's interior that does not intersect this region.

Syntax

Status Complement(
  const Rect & rect
);

Parameters

rect

Reference to a rectangle to use to update this Region object.

Return value

Type: Status

If the method succeeds, it returns Ok, which is an element of the Status enumeration.

If the method fails, it returns one of the other elements of the Status enumeration.

Remarks

Examples

The following example creates a region from a path and then uses a rectangle to update the region.

VOID Example_ComplementRect(HDC hdc)
{
   Graphics graphics(hdc);

   SolidBrush solidBrush(Color(255, 255, 0, 0));

   Point points[] = {
      Point(110, 20),
      Point(120, 30),
      Point(100, 60),
      Point(120, 70),
      Point(150, 60),
      Point(140, 10)};

   Rect rect(65, 15, 70, 45);

   GraphicsPath path;

   path.AddClosedCurve(points, 6);

   // Create a region from a path.
   Region region(&path); 

   // Update the region so that it consists of all points inside the 
   // rectangle but outside the path region.
   region.Complement(rect);

   graphics.FillRegion(&solidBrush, &region);
}

Requirements

See also

Region

Rect

Status