====== SCRFILE lineVar, filenameVar ======
Find a file name and line number that is currently on the screen.  

       lineVar       = Should be set before calling to the line number to start searching on (1 is the top line); Will be set to the line number where the file name was found or 0 if no file name was found filenameVar = Will be set to the file name if one is found on screen  

**See also:** ScrText