To extract a resource, click on the resource you wish to extract and select 'Extract' from the 'Resource' menu, or press CTRL-E.
When the resource is extracted, it is saved to disk in its raw format (i.e. not converted to annother format such as BMP or midi). The 5 byte or 7 byte resource header used in the VOL files is not saved as this is not part of the resource. In version 3 games, the resource is uncompressed before saving to disk.