>I found some files on network with extensions .DEF .FON .VUE. These files is with numeric names (like vfp temporary files), but seems used for fonts. Is someone knows if it's associated with Visual Foxpro programming or with another software? Any idea?

Two last I can recognize. .FON is for font, you're right. .VUE is saved view (relations) defintion.

.DEF is also a bit familar, but can't recall at the moment.

BTW, what should be your thread's title?