This format is used for data exchange in programs that work with vector graphics from Corel, and also for printing completed designs. It contains image data and also the metadata that describes it. In CMX it’s possible to store layers that can be independently edited. The format is recognized by Adobe Illustrator versions 6-8.
ICO is an image file format that can contains image icons. ICO is used in Microsoft Windows Operating systems to contain the icon files. It typically contains bitmap images. Also ICO files are used in websites as favicon. It supports 24 bit colors images.