I have some software that needs to identify a file as a qvf file based on the content (as the file extension cannot be relied on for identification). I notice that the mime-type for your qvf files is not registered with IANA, so can you let me know the magic bytes in the file header that can be used to identify the file type?
What kind of software is that? is it to do with taking backups/virus scanners things like that?
I didn't see a way of recognizing binary file weather it is a QVF or not. But when you edit the file using Notepad++ you can see it is QVF file with version (line2) and and app name. probably this is not going to work for your software.