Text to Mtext conversion using lisp previous selection set? (COMMAND " txt2mtxt s1")?

Is there a way to use lisp to convert text to mtext? Using (COMMAND " txt2mtxt") will not

work. I would like to use lisp to start txt2mtxt text to mtext converter then use a previous selection set from another

lisp routine. In this case s1 is my previous selection set. I thought (COMMAND " txt2mtxt" s1)

might do it but it does not.

Thank you,

These may be of use:

http://www.cadtutor.net/forum/showthread.php?51975-Auto-Selecting-Text

http://www.cadtutor.net/forum/showthread.php?16678-Convert-text-to-mtext-in-lisp

Never mind, my command worked when I put it in a file.

Thank you,