C / C++ / MFC

ForNow wrote:

I get compiler error which make no sense to me

ASSERT(m_hDC == NULL);      // only attach once, detach on destroy

class CGraphDlg : public CDialog

this->SetWindowPos(&CWnd::wndBottom, rc.left, rc.top, rc.Width(), rc.Height(), SWP_SHOWWINDOW);

void CGraphDlg::InitGraph()
{
	
        CRect rectControl5;		// area of control being moved - divider line above controls
	CBitmap image;			// bitmap with logo

	// This functions sets up the bitmap in memory. Called from OnInitDialog.

	CDC * pDC = GetDC();
	
	if (!not_first_paint)
	{
		image.LoadBitmap(IDB_GRAPHBLANK);	// load in a blank BMP of the desired size
		dcGraphMem.CreateCompatibleDC(pDC);
		// Select the bitmap into the new DC in memory.
		dcGraphMem.SelectObject(&image);
	}

	// save window size
  	GetClientRect(GraphWindow);
	YSCALE = GraphWindow.Height() - 191;		
	graphx = GraphWindow.Width() - 212;		// current graph working area width
	
	// adjust size of the bitmap to the actual window size
	StretchBlt (dcGraphMem, 0, 0, GraphWindow.Width(), GraphWindow.Height()-25, dcGraphMem, 0, 0, 1600, 1044 , SRCCOPY);

	
	ReleaseDC(pDC) ;


	m_divline.GetParent()->GetClientRect(GraphWindow);
	m_divline.GetWindowRect(rectControl5);
	m_divline.MoveWindow(0, GraphWindow.Height()-BOTTOMCONTROLS-2, rectControl5.Width(), rectControl5.Height());

	image.DeleteObject();


	// now we know we went through graph initialization, 
	not_first_paint = true;


	return;
}

if (dcGraphMem.m_hDC != NULL)
	dcGraphMem.DeleteDC();

CDC * pDC = GetDC();

	if (dcGraphMem.m_hDC == NULL)
		dcGraphMem.CreateCompatibleDC(pDC);