OpenCv fillPoly polylines

#include "stdafx.h"
#include 
#include 
#include 
#include 

using namespace cv;
using namespace std;

void MyPolygon( Mat& img );

int _tmain(int argc, _TCHAR* argv[])
{  
	Mat img = imread("d://1.jpg");
	namedWindow("Test",CV_WINDOW_AUTOSIZE);
	MyPolygon(img);
	imshow("Test", img);
	waitKey(0);
	return 0;
}

void MyPolygon( Mat& img )
{
  /** Create some points */
  Point rook_points[1][20];
  rook_points[0][3] = Point( 100, 10 );
  rook_points[0][0] = Point(10, 10 );
  rook_points[0][1] = Point( 20, 100 );
  rook_points[0][2] = Point( 100, 200 );


  const Point* ppt[1] = { rook_points[0] };
  int npt[] = { 4 };

  //fillPoly( img, ppt,npt,1,Scalar( 0, 255, 255 ),8 );			
  polylines(img,ppt,npt,1,1,CV_RGB(0,255,0),2,8,0);
}