Отрисовка в Bitmap-DC и масштабирование в Screen-DC

Отрисовка в Bitmap-DC и масштабирование в Screen-DC

DrawBarcode (HDC hDC, long xpos, long ypos)
{
    RECT  hRect;
    long  lHRHeight = 0;

    ypos += GetFullHeight();
    hRect.left     = xpos;
    hRect.top      = ypos;
    hRect.right    = hRect.left   + width;
    hRect.bottom   = hRect.top    + height;

    HDC memDC;
    HBITMAP memBMP, oldBMP;
    int width, height;
    RECT draw;

    width = abs(hRect.right - hRect.left);
    height = abs (hRect.bottom - hRect.top);

    draw.left = 0;
    draw.bottom = height;
    draw.top = 0;
    draw.right = width;

    memDC = CreateCompatibleDC(hDC);
    memBMP = CreateCompatibleBitmap(hDC, width, height);

    oldBMP = (HBITMAP) SelectObject(memDC, memBMP);

    if (S_OK = BCDraw(pBarcode, memDC, &draw))
    {
        // scale / copy to target DC
        BitBlt(hDC, hRect.left, hRect.top, width, height, memDC, 0, 0, SRCCOPY);
        SelectObject(memDC, oldBMP);
    }
    DeleteObject(memBMP);
    DeleteDC(memDC);
}