cmd

I want to write app look like CMD

I did all the work
It use CMD commands and others too but I have a problem
in tetbox I can not show client help..
e.g
shutdown - 0t 20
shutdown - r -t 1-
etc

I want to write lines.
I write
txtclient.text= "command" and when I **** ENTER it sad me thet here must write new VB command

please help me

I use VB 2010

HELP

View of the code with highlighted line of error would be helpful.