Reg :alv popup with check boxes

Hi Floks,

My requirement is to create dynamic search help in alv in first screen when I execute then I need to get generate an multiple check box in alv popup list box if I clicked one or two in that display its automatically append to the internal table . could you please help how write it if any pseudo code forward me .links if u have forward me regarding this.

Thanks For Advance,

Sunitha