I'm not quite sure exactly what you are talking about but here's the first thing that came to my mind...
From the help file: //echo $?!="Shall I continue?"
In this case, a Yes/No dialog pops up. If the user clicks on Yes, $true is returned, otherwise $false is returned.
The input dialog is extended vertically to display the whole message if it is very long. You can also make text appear on different lines by using the $crlf identifier to separate the lines, eg.
//echo $?="This is on the first line. $crlf $+ And this is on the 2nd line."
Then here was the second thing that came to myh mind...
Dialogs? Maybe I am unaware of a command that makes something like this pop up unless you were using a script with aliases to make a dialog pop up. You could look into dialog studio
here. If you are curious about it.