I have a bitmap on a picturebox which can be drawn either in a color scale or a gray scale. Either mode is represented by another 2 tiny control pictureboxes.
If the current state is grayscale (color), then I'd like the color (grayscale) control pbox to appear raised, i.e. the colors of the upper and left borders exchanged with those of the lower and right borders (see picture).
I think there was a very easy way but I have forgotten and it's no longer in my bag of tricks.




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