Creates a subprocess by calling the OpenVMS Run-Time Library
       routine LIB$SPAWN.

1  –  Input

       Type FN$SPAWN at the DTR> prompt to create the subprocess.

2  –  Output

       Your default DCL prompt appears on the screen. You can then
       invoke utilities or enter commands.

       Type LOGOUT after the DCL prompt to return to your original
       process in DEC DATATRIEVE. A message is printed on the screen
       indicating that you have logged out of the subprocess. DEC
       DATATRIEVE generates the DTR> prompt, showing that control has
       been returned to the original process in DEC DATATRIEVE.

3  –  Example

       DTR> FN$SPAWN
       $ MAIL
         .
         .
         .
       MAIL> EXIT
       $ LOGOUT
         Process PROCESSNAME_1 logged out at 25-FEB-1990 09:47:09:27
       DTR>