DOS Unit
                             DosError Messages

     The error codes returned by DosError are equivalent to error
     codes produced by DOS.  A value of 0 indicates no error has
     occurred.  This is the default value.  Some possible error
     codes are:

                              2 = File not found
                              3 = Path not found
                              5 = Access denied
                              6 = Invalid handle
                              8 = Not enough memory
                             10 = Invalid environment
                             11 = Invalid format
                             18 = No more files