ConvertFromURL Function
Kino-convert ang isang URL ng file sa isang pangalan ng file ng system.
String
filename: Isang pangalan ng file bilang isang string.
5 Di-wastong procedure call
    systemFile$ = "c:\folder\mytext.txt"
    url$ = ConvertToURL( systemFile$ )
    print url$
    systemFileAgain$ = ConvertFromURL( url$ )
    print systemFileAgain$