Dynamic Fields in Smartforms - Is it Possible?

Hi Gurus,

I have a requirement in which before calling the smartform the fields would be dynamically selected and the selected fields only have to be printed.

For Example, I have all values(28 fields) in a internal table but before printing the user will select only whatever fields he whats to be in the printout.

Say for the first time if he want 15 fields he will select that fields, and the next time he may select another set of fields...

My doubt was, is this possible in smartform?

If Possible how i have to proceed....

Please suggest some ideas.....

Thanks in advance...

Regards

Karthik D