GraphicsPath.AddPolygon(const PointF*, INT) method

项目
03/07/2012

Applies to: desktop apps only

The GraphicsPath::AddPolygon method adds a polygon to this path.

Syntax

Status AddPolygon(
  [in]  const PointF *points,
  [in]  INT count
);

Parameters

points [in]
Type: const PointF*

Pointer to an array of points that specifies the vertices of the polygon.
count [in]
Type: INT

Integer that specifies the number of elements in the points array.

Return value

Type:

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

The GraphicsPath::AddPolygon method is similar to the AddLines method. The difference is that a polygon is an intrinsically closed figure, but a sequence of lines is not a closed figure unless you call GraphicsPath::CloseFigure. When Windows GDI+ renders a path, each polygon in that path is closed; that is, the last vertex of the polygon is connected to the first vertex by a straight line.

Examples

The following example creates a GraphicsPath object path, adds a polygon to path, and then draws path.

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

   PointF pts[] = {PointF(20.0f, 20.0f),
                   PointF(120.0f, 20.0f),
                   PointF(120.0f, 70.0f)};

   GraphicsPath path;
   path.AddPolygon(pts, 3);

   // Draw the path.
   Pen pen(Color(255, 255, 0, 0));
   graphics.DrawPath(&pen, &path);
}

Requirements

Minimum supported client	Windows XP, Windows 2000 Professional
Minimum supported server	Windows 2000 Server
Product	GDI+ 1.0
Header	Gdipluspath.h (include Gdiplus.h)
Library	Gdiplus.lib
DLL	Gdiplus.dll