void CBmpTestDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CPaintDC dc(this); // device context for painting
		CPen newpen(PS_SOLID,1,RGB(0,255,0));
		CBrush newbrush(RGB(0,0,255));
		CPen *pOldpen=dc.SelectObject(&newpen);
		CBrush *pOldbrush=dc.SelectObject(&newbrush);
		dc.MoveTo(10,10);
		dc.LineTo(100,100);
		dc.Ellipse(120,120,160,160);
		dc.SelectObject(pOldpen);
		dc.SelectObject(pOldbrush);
		CDialog::OnPaint();
	}
}
