The MagickWand interface is a new high-level C API interface to ImageMagick core methods. We discourage the use of the core methods and encourage the use of this API instead. Post MagickWand questions, bug reports, and suggestions to this forum.
Not sure what you're asking. If you want to destroy an image, just destroy the wand with DestroyMagickWand(). The file handle associated with an image is automatically closed after the image is read.