[magick++] copying & pasting portions of an image.

[magick]

Use getPixels(). To access MagickCore methods preceed them with MagickLib::, for example, MagickLib::GetImagePixels().

[magick]

Your code only assigns the first pixel, you need to iterate to assign all pixels. Don't forget to call syncPixels() to push the updates to the pixel cache.

[magick]

syncPixels() just returns but its necessary to ensure the pixel updates are pushed to the pixel cache.

[magick]

Try

• *q=(*p);