InfoPath Dev

Hi, I am new to the InfoPath world, and I am wondering is there a way to debug InfoPath form? I searched the web, but only thing I found is, how to debug InfoPath script or backend code. But what if I want to debug an expression that I put into a InfoPath field? Say for example, I have an expression where I am comparing data from sharepoint list and web service or doing some operation on them, how can view what data I am getting or the result of the operation? Thank you, Arya

When I design a form, I'll have a Debug view, which hold my form fields, expression boxes, formulas, etc to show me the result of my rules and operations. You could have expression boxes that show you the result of your expression, bit by bit.