Flash Forms --- Please Help!

Getting desperate here, what I am trying to do is have a text area information gathered from a seperate combo box. Is this possible, I want my users to select text from a combo box and then have that text generated into my textarea. I’m sure i’ve seen this done before but am not sure what steps i need to take to make it actually work. Does someone know how to do this, or can they point me in the right direction to make this happen. I havent found too many flash tutorials on the web and it looks like this site is my best hope.