CRC32 returns a 32bit checksum of a file or a memory block. It can be used to validate the authencity of data or detect corruption/modifications. Just feed it with the filename/path (or memblock). There is an example in English here: http://www.coolbasic.com/cbmanual/commands/crc32.html
The current CoolBasic is a procedural language. However, there is a new product, CoolBasic V3, in development, and it'll be fully object oriented language.
CoolBasic henkilökuntaa Johtava Suunnittelija CoolBasic V3, CoolBasic Classic