Where to find a curve control like the one in Photoshop (ctrl-M) for C++ ???

Hello,

I need to implement something similar to filters for a
bitmap application I am developing. The ideal control
would be something like Photoshop is using. It displays
a graph and the user can alter the curve, change its slope,
origin, ending and what not... That what I need but I have
been unable to find any such control!!!

the basic idea if to allow the user to specify that
below such pixel value (0-255), all pixels should be = y.
He sould also be able to specify than above a certain value
all pixel should be = y. And in between those min and max
the pixel should follow a curve so that if its value is
x, it will be replaced by f(x), where f is defined by the
control and the curve the user "draws"...

Do you know of any I can have control that is behaving just
like the one in photoshop (free hopefully) and any doc
on how to implement one?

thanks for any information, such a control would simplify
the user interface and make the software that more
attractive ;-)



LVL 2
aquila98Asked:
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migelConnect With a Mentor Commented:
hi! can you implement code from this article
http://www.codeguru.com/gdi/Spline.html
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aquila98Author Commented:
Thanks,

with this I was able to bet a working demo and work from there :)
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