If I call GraphicsPath::GetBounds() with no transform matrix and a pen, as
follows

result = myPath.GetBounds(&myRect, NULL, &myPen);

I get a rectangle that's much larger (generally several pixels on each side)
than the path I defined. I've set the pen width to 0.5 and I have
PenAlignmentCenter set.

If I make the same call without the pen, i.e.

result = myPath.GetBounds(&myRect);

I get exactly what I expect, although the pen thickness is not taken into
account.

Is this a known problem, or am I missing something?

On Dec 18 2009, 9:20*am, nomad <no... (AT) discussions (DOT) microsoft.com>
wrote:
It is pretty wierd, isn't it? It seems to enlarge the path by 10x the
pen width. A look in msdn gives the answer: the pen width is
multiplied by the MiterLimit and the default for that is apparently
10. So the solution is to set your pen's MitreLimit property to 1
before measuring the bounds.

bye, BB