How should i make a String called 'packets' send to Text2_Change.. And let it say "Found!"

Code:
Private Sub Text2_Change()
if packets = "word" then
msgbox "Found"
end if
end Sub
And yes, i'm doing other stuff with the sub.. this is just an example..
IF the option Change isn't possible.. how should i send the "packets" to the Sub..

Thanks in advance..