Use case:
- User has Windows guest. We wants to open one mp3 file using vlc player on linux.
- User right clicks on file
Clicks "Open file with host process"
Writes/selects "vlc".
Vlc is started and playing music on host side
- Guest file is copied to temporary shared folder by guest additions
According process is called on host side to open a file
When process is closed, file might be copied back to guest side (to support writing)