Smart Form Issue

Hi,

I have to design a module pool screen with fields to be added from a ztable.

Now i have to attach a smart form with that so that the data entered into the fields is shown on that smart form.

My problem is that,

If a user enter values in some fields leaving others blank, then only those fields will be shown on smart form and others will not be displayed along with there labels.

How to achieve that.?

Please help.