how to place a message on the bottom of the screen

["Prowak, Dave" <dProwak@xxxxxxxxxxxxxxxxx>]

Hi,

I've defined a cmd that resets the password of a user.
i.e.  Joe User calls in, says "I forgot my password", we run the command 
against the user ID, the password is reset, everyone's happy....

I'd like to send notification to the person running the command if the User ID 
that was passed in is not a valid user ID.  
I'd like to place the message on the bottom of the screen.  I've tried SNDMSG 
and SNDUSRMSG but these require the
person running the command to enter "dspmsg" on the command line.  How can I 
get a message to appear at the bottom of the screen?

TIA,
Dave