Basic Multiple Forms question

I am trying to get a simple c# pocket pc app to work, and i am coming from the web side and some of this is new to me. I want a 2 form application. And basically hit a button on form1 and opens form2. Form1 sends some info and and populates some stuff in form2, none of this is a problem. I just set the fields to public and it work perfectly. The problem i am having is getting the information that i enter into form2 back over to form1. I am assuming i am missing something pretty easy. I have googled and came up empty. There have been some hits that are similar, but more complex. Any pointers would be great. Thanks, Brian