Enlarge font size and printing margin, when printing from multi-line CEdit

Finally, I manage to get code snippet to make multipline CEdit
printing works. It works pretty well with unicode and tab.

void HelloWorld::PrintReport()
{
    CPrintDialog pDiag(FALSE, PD_RETURNIC |
        PD_RETURNDC | PD_DISABLEPRINTTOFILE |
        PD_NOPAGENUMS | PD_NOSELECTION, NULL);

    if (pDiag.DoModal() == IDOK)
    {
        HDC hPDC = pDiag.GetPrinterDC();
        CDC DC;
        DC.Attach(hPDC);

        // This is the way I try to enlarge the printing font size.
        // However, it seems doesn't work well.
        // The effect is just same as without explicit DC's
SelectObject
        //
        // Currently, The screen display font size at CEdit is OK.
        // However, the output to the paper is just *too* small.
        CFont font;
        LOGFONT logFont;
        this->text_area.GetFont().GetLogFont(&logFont);
        logFont.lfHeight = 1000;
        font.CreateFontIndirectW(&logFont);
        DC.SelectObject(&font);

        TCHAR DocName[32] = _T("Error Log");
        DOCINFO DI;
        ZeroMemory(&DI, sizeof(DOCINFO));
        DI.cbSize = sizeof(DI);
        DI.lpszDocName = DocName;

        if (DC.StartDoc(&DI) != -1)
        {
            DC.StartPage();
            DC.SetMapMode(MM_TEXT);
            // text_area is my multiline CEdit.
            this->text_area.Print(&DC, PRF_CLIENT);
            DC.EndPage();
            DC.EndDoc();
        }
        else
        {
            AfxMessageBox(_T("Couldn't Print"));
        }

        font.DeleteObject();
    }
}

   1. How I can enlarge my font size, with rest of the font attribute
remains the same?
   2. The output is with 0 margin. I would like to have same space
from the left. How I can do so?

Thanks.