FILE = "filename";      Specify file for READ or WRITE

The FILE control specifies the name of the output file generated
by a WRITE procedure or the name of the input file for a READ
function.  The 'filename' must conform to DOS file name standards. 
The 'filename' parameter must be surrounded by double quote
characters.

Note that while WRITE output may be sent to a communications
port, no handshaking or error checking is done other than that
provided by the DOS BIOS.  It would be more appropriate to
generate the data file on disk and subsequently send it via a
general purpose communications program.
