is there a way to change text in a label using a button that set it as one thing?

i.e.:
Button_Click()
label.caption = "blah" & form1.text1.text & "blah"

what i want to do is make it so that when i change the text in the box the caption changes.

from: blah hi blah
to blah bye blah

using the same buton

how do i do that?

please respond asap!!