C / C++ / MFC

void CGraphEllipse::zeichne(CDC* pDC)// Draw an ellipse
{ if( m_listAbschnitte.IsEmpty() ) return;
  if( m_a == 0.0 )             return;
  CPen   *pOldPen   = pDC->SelectObject(&m_penStift);// use my pen
  CBrush *pOldBrush = pDC->SelectObject(&m_brPinsel);// use my brush for drawing

  XFORM xfMatrix;//Transformation matrix
  xfMatrix.eM11 = 1.0;//At the beginning there is no transformation
  xfMatrix.eM12 = 0.0;
  xfMatrix.eM21 = 0.0;
  xfMatrix.eM22 = 1.0;
  xfMatrix.eDx  = 0.0;// and no translation
  xfMatrix.eDy  = 0.0;

  double dSinPhi = 0;// no rotation so far
  double dCosPhi = 1;
  double dPhi    = 0;
  // m_a = r1²  m_c = r2² m_b = 0(initially)
  // Circles can't be rotated 
  if( m_c != m_a ) dPhi = atan2(2*m_b,(m_a-m_c))/2.0;

  dSinPhi = sin(dPhi);
  dCosPhi = cos(dPhi);

  xfMatrix.eM11 = dCosPhi; // Now fill in the rotating values
  xfMatrix.eM12 = dSinPhi;
  xfMatrix.eM21 = -dSinPhi;
  xfMatrix.eM22 = dCosPhi;
  xfMatrix.eDx  = m_ptZiehZentrum.x; // Translation component
  xfMatrix.eDy  = m_ptZiehZentrum.y;
  SetGraphicsMode(pDC->m_hDC,GM_ADVANCED);// Tell the DC we want to use path functions
  pDC->BeginPath(); // start path
  SetWorldTransform(pDC->m_hDC,&xfMatrix);// set transforming to do
  pDC->Ellipse(-(int)m_dR1,-(int)m_dR2,(int)m_dR1,(int)m_dR2);// Draw ellipse
  pDC->EndPath();// Path finished
// Now draw the lines and/ or fill pattern
  if( m_bGeschlossen )
    { if( m_bOpaque ) pDC->StrokeAndFillPath();//  with fill pattern
      else            pDC->StrokePath();// without fill pattern
    }
  else				   pDC->StrokePath();
  pDC->SelectObject(pOldPen);
  pDC->SelectObject(pOldBrush);  
  ModifyWorldTransform(pDC->m_hDC,NULL,MWT_IDENTITY);// restore old transformation
  SetGraphicsMode(pDC->m_hDC,GM_COMPATIBLE);// restore old DC mode
}

class CTest  <br />
{<br />
public:<br />
	CTest();<br />
	CTest(int x);<br />
	virtual ~CTest();<br />
};<br />

class CTest  <br />
{<br />
public:<br />
	CTest(int x);<br />
	virtual ~CTest();<br />
};<br />

<br />
CTest* test = new CTest(3);<br />

extern string strDay[7];
extern string strMonth[12];

class CLogBook
{
public:
	CLogBook();
	virtual ~CLogBook();

	BOOL Open(string);
	void Close();

	BOOL FillListBox(HWND);
	virtual BOOL Write(string) = 0;
	BOOL Clear();

protected:
	fstream m_filestream;
};

class CErrorLog : public CLogBook
{
public:
	CErrorLog();
	~CErrorLog();

	BOOL Write(string);
};

#include "stdafx.h"

string strDay[7] = {"Söndag", "Måndag",
					"Tisdag", "Onsdag",
					"Torsdag", "Fredag",
					"Lördag"};

string strMonth[12] = {"januari", "februari", "mars",
					   "april", "maj", "juni",
					   "juli", "augusti", "september",
					   "oktober", "november", "december"};

CLogBook::~CLogBook()
{
	Close();
}

BOOL CLogBook::Open(string path)
{
	m_filestream.open(path.c_str(),
					  ios_base::in | ios_base::out | ios_base::app);
	
	if(!m_filestream.is_open())
		return FALSE;

	return TRUE;
}

void CLogBook::Close()
{
	if(!m_filestream.is_open())
		m_filestream.close();
}

BOOL CLogBook::Clear()
{
	if(!m_filestream.is_open())
		return FALSE;

	m_filestream.write("",0);
	return TRUE;
}

BOOL CLogBook::FillListBox(HWND listbox)
{
	if(!m_filestream.is_open())
		return FALSE;

	m_filestream.seekg(0);
	while(!m_filestream.eof())
	{
		string buf("");
		getline(m_filestream, buf, '\n');
		ListBox_AddString(listbox, buf.c_str());
	}
	return TRUE;
}

BOOL CLogBook::Write(string data)
{
	if(!m_filestream.is_open())
		return FALSE;

	m_filestream.write(data.c_str(), (int)data.length());
	return TRUE;
}

///
/// CErrorLog derived class
///

BOOL CErrorLog::Write(string data)
{
	string strDataToWrite("");
	strDataToWrite.append(DateTimeString());
	strDataToWrite.append(" > ");
	strDataToWrite.append(data);

	return CLogBook::Write(strDataToWrite);
}

DWORD dwCb = sizeof(RASENTRYNAME);<br />
DWORD dwEntries = 0;<br />
RASENTRYNAME lpRasEntryName[20];<br />
<br />
ZeroMemory(lpRasEntryName, sizeof(lpRasEntryName));<br />
<br />
lpRasEntryName[0].dwSize = sizeof(RASENTRYNAME);<br />
RasEnumEntries(NULL,NULL,lpRasEntryName,&dwCb,&dwEntries);

DWORD dwCb = 20 * sizeof(RASENTRYNAME);