Problem with Offset

Hi I'm making a simple drawing program I used offset to set up a specific drawing but when it is drawn it moves by about 1 pixel and if one draws another everything of specific function moves again by 1 pixel so if there many pictures some may be deleted. There'a also another function set without offset and it works fine. What can I do with it? I think one solution could be changing mouse functions but others wont work the problem is in the offset.

Class code:

Code:

CS2::CS2(CPoint Start, CPoint End, COLORREF aColor)
{
	m_PunktP = Start;
	m_PunktD = End;
	m_Color = aColor;
	m_Pen = 1;
	m_EnclRect = CRect(Start, End);
	m_EnclRect.NormalizeRect();
}

CS2::~CS2(void)
{
}
void CS2::Draw(CDC* pDC)
{
	CPen aPen;
	POINT pt;
	if(!aPen.CreatePen(PS_SOLID, m_Pen, m_Color))
	{
		AfxMessageBox(_T("Pen creation failed"), MB_OK);
		AfxAbort();
	}
	CPen* pOldPen = pDC->SelectObject(&aPen);
	pDC->MoveTo(m_PunktP);
	pt.x = 0;
	pt.y = 63;
	m_PunktP.Offset(pt);
	pDC->LineTo(m_PunktP);
	pt.x = 95;
	pt.y = 0;
	m_PunktP.Offset(pt);
	pDC->LineTo(m_PunktP);
	pt.x = 0;
	pt.y = -75;
	m_PunktP.Offset(pt);
	pDC->LineTo(m_PunktP);
	pt.x = -32;
	pt.y = 13;
	m_PunktP.Offset(pt);
	pDC->LineTo(m_PunktP);
	pt.x = 0;
	pt.y = -13;
	m_PunktP.Offset(pt);
	pDC->LineTo(m_PunktP);
	pt.x = -32;
	pt.y = 13;
	m_PunktP.Offset(pt);
	pDC->LineTo(m_PunktP);
	pt.x = 0;
	pt.y = -13;
	m_PunktP.Offset(pt);
	pDC->LineTo(m_PunktP);
	pt.x = -32;
	pt.y = 13;
	m_PunktP.Offset(pt);
	pDC->LineTo(m_PunktP);
	pDC->SelectObject(pOldPen);
}