function FileExists(FileName: String): Boolean;
{ Boolean function that returns True if the file exists;otherwise,
 it returns False. Closes the file if it exists. }
var
 F: file;
begin
 {$I-}
 Assign(F, FileName);
 FileMode := 0;  ( Set file access to read only }
 Reset(F);
 Close(F);
 {$I+}
 FileExists := (IOResult = 0) and (FileName <> '');
end;  { FileExists }