CSB files are associated with CorelDraw Graphics Suite software component called PHOTO-PAINT, a raster graphics editing tool. CSB files store scripts used for automating certain PHOTO-PAINT tasks.

Users can create Corel PHOTO-PAINT scripts while working on a project, saved them and use in other projects. CSB files cannot be exported to other formats. CSB files are not backward compatible, which means that older versions of PHOTO-PAINT may not be able to open CSB files created with newer versions.