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Код

void CPrintSolvedNUDialog::OnBnClickedOk()
// если была нажата кнопка "Печать"
{
    // TODO: добавьте свой код обработчика уведомлений
    int  i, n, len, cyChar, cyPage, yPos;
    char  s[256];
    CString  myString;
    LPCSTR  pzText;
    LPTSTR  lpszText;
    DWORD  size = MAX_PATH;
    TCHAR  temp[MAX_PATH];
    TEXTMETRIC  txtm;
    LOGFONT lf;
    FILE *f;

    CPrintDialog  cp(FALSE);
    if (cp.DoModal()==IDOK)
    {
        CDC  printDC;
        printDC.Attach(cp.GetPrinterDC());
        cyPage = printDC.GetDeviceCaps(VERTRES);
        printDC.GetTextMetrics(&txtm);
        cyChar = txtm.tmHeight + txtm.tmExternalLeading;
        yPos = 0;
        DOCINFO  docinfo;
        ::ZeroMemory(&docinfo,sizeof(DOCINFO));
        docinfo.cbSize = sizeof(docinfo);
        docinfo.lpszDocName = "Simple";
        docinfo.lpszOutput = NULL;
        docinfo.lpszDatatype = "RAW";
        docinfo.fwType = 0;
        CFont *savedFont;
        savedFont = printDC.GetCurrentFont();
        savedFont->GetLogFont(&lf);
        strcpy(lf.lfFaceName,"Courier New");
        lf.lfHeight = 60; // 60 вместо 10
        lf.lfWidth = 48; // 48 вместо 8
        CFont  myFont;
        myFont.CreateFontIndirectA(&lf);
        printDC.SelectObject(&myFont);
        if (printDC.StartDoc(&docinfo)>0)
        {
            if (printDC.StartPage()>0)
            {
                f = fopen("results.txt","rt");
                while (!feof(f))
                {
                    fgets(s,256,f);
                    len = strlen(s);
                    pzText = (LPCSTR)s;
                    printDC.TextOutA(0,yPos,pzText,len);
                    yPos += cyChar;
                }
                fclose(f);
                printDC.EndPage();
            }
            printDC.EndDoc();
        }
        printDC.SelectObject(savedFont);
        printDC.Detach();
    }
    CDialogEx::OnOK(); 
}