Refresh textbox to reflect scroll bars if appropriate
 

When I Load a form with txtcomment (the 1st record has 6 actual lines of
data in the textbox) But Only the first 3 lines show up -- so I'd like
for the vertical scroll-arrows to be shown it put the user on guard that
there are additional lines beyond the three being shown. How can I
achieve this?

If I change to the 2nd record which has only one line of info the
scrollbars
Can of course disappear.

Tks in Advance...