I wrote earlier:

> Given a color index or RGB color value, how can I find the
> inverted color I would get if I used an API like WinInvertPixel
> on a pixel of the said color?


I tried shifting the color index by half the number of available colors but 
that does not exactly correspond to the inverted color (ex. 255/black becomes 
127 or ... brownish green).

So, how do APIs like WinInvertPixel do that? Ben would know...


Luc Le Blanc 
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