InfoPath Dev

I tried doing the calculation in the formula field but it seems as if infopath will not allow you to multiply dates. The form is simply being sent between users, information just has to be validated to avoid unnecessary work. Thanks

I need to write a very simple script but I'm having trouble even getting started. How to I refer to objects on my form in my code? I want to take a time value from one text box, round it to the nearest quarter hour, then put that rounded value into a different text box. I can't figure out how to refer to these ...