CRectTracker problems

Following useful advice from here, I am now "enjoying" my first date with
CRectTracker.

If I ask it for the hatched style (CRectTracker::hatchInside) then it draws
the hatching in a rather low contrast, using diagonals of colour black and
'darkened-background'.

On a white area this is black and grey; on a yellow area it is black and
muddy-brown.

The hatching is just about discernible but with the edge only shown hatched
(CRectTracker::hatchedBorder style) the contrast is so low it looks solid.

Has anyone had this problem? Solved it?

[More detailed info below sig.]

Dave

-- David Webber
Mozart Music Software
http://www.mozart.co.uk
For discussion and support see
http://www.mozart.co.uk/mozartists/mailinglist.htm

The CRectTracker::Draw() function seems rather inflexible in this regard.
Here's a chunk of it:

// hatch inside
if ((m_nStyle & hatchInside) != 0)
{
    pTemp = pDC->SelectStockObject(NULL_PEN);
    if (pOldPen == NULL)
        pOldPen = (CPen*)pTemp;
    pTemp = pDC->SelectObject(CBrush::FromHandle(_afxHatchBrush));
    if (pOldBrush == NULL)
        pOldBrush = (CBrush*)pTemp;
    pDC->SetBkMode(TRANSPARENT);
    nOldROP = pDC->SetROP2(R2_MASKNOTPEN);
    pDC->Rectangle(rect.left+1, rect.top+1, rect.right, rect.bottom);
    pDC->SetROP2(nOldROP);
}

Is the problem in the rop code?

"R2_MASKPENNOT Pixel is a combination of the colors common to both the pen
and the inverse of the screen (final pixel = (NOT screen pixel) AND pen). "
What does this do for a NULL Pen???

==============
The bitmap used to create _afxHatchBrush (called from the CRectTracker
constructor) looks ok to me: It is a monochrome diagonal stripy thing:

if (_afxHatchBrush == NULL)
{
    // create the hatch pattern + bitmap
    WORD hatchPattern[8];
    WORD wPattern = 0x1111;
    for (int i = 0; i < 4; i++)
    {
        hatchPattern[i] = wPattern;
        hatchPattern[i+4] = wPattern;
        wPattern <<= 1;
    }
    HBITMAP hatchBitmap = CreateBitmap(8, 8, 1, 1, hatchPattern);
    if (hatchBitmap == NULL)
    {
        AfxUnlockGlobals(CRIT_RECTTRACKER);
        AfxThrowResourceException();
    }

    // create black hatched brush
    _afxHatchBrush = CreatePatternBrush(hatchBitmap);
    DeleteObject(hatchBitmap);
    if (_afxHatchBrush == NULL)
    {
        AfxUnlockGlobals(CRIT_RECTTRACKER);
        AfxThrowResourceException();
    }
}