C / C++ / MFC

void EllipseEx(CDC &dc, int cx, int cy, int rx, int ry, int degrees)
{
	const int Segments = 12;
	const int PointCount = 1 + 3 * Segments;
	const double Alpha = 3.14159265359 / Segments;
	const double Beta = 4 * (1 - cos(Alpha)) / (3 * sin(Alpha));

	double px[PointCount], py[PointCount];
	double Angle, CosA, SinA;

	for (int i = 0; i < Segments; i ++)
	{
		Angle = 2 * i * Alpha;

		CosA = cos(Angle);
		SinA = sin(Angle);
		int k = 3 * i;
		int j = (i == 0) ? 3 * Segments - 1 : k - 1;
				
		px[k] = rx * CosA;
		py[k] = ry * SinA;

		SinA *= Beta * rx; //* SinA;
		CosA *= Beta * ry; //* CosA;

		px[j] = px[k] + SinA;
		py[j] = py[k] - CosA;

		px[k + 1] = px[k] - SinA;
		py[k + 1] = py[k] + CosA;
	}

	px[PointCount - 1] = px[0];
	py[PointCount - 1] = py[0];

	Angle = 2 * 3.1415927 * degrees / 360;
	CosA = cos(Angle); 
	SinA = sin(Angle); 
	
	POINT pt[PointCount];
	for (i = 0; i < PointCount; i ++)
	{
		pt[i].x = cx + (LONG)(0.5 + px[i] * CosA - py[i] * SinA);
		pt[i].y = cy + (LONG)(0.5 + px[i] * SinA + py[i] * CosA);
	}

	PolyBezier(dc, pt, PointCount); 
}

class CYourApp : public CWinApp
{
// ...
public:
CDaoDatabase& GetDatabase() { return m_db; }
private:
CDaoDatabase m_db;
// ...
};

// ... somewhere in dialog methods
CDaoDatabase &db = static_cast<CYourApp *>(AfxGetApp())->GetDatabase();