How to capture the checkbox status in ALV Grid display

I need some immediate help regarding Grid ALV.

My Requirement: I need to display an ALV grid report along with checkboxes. Further, I need to provide an option wherein the user can checkboxes and select the records that I need to process further (by clicking the process button on the ALV Report).

My Query: The problem here is that I am not able to capture the status of the checkboxes. This means that I am not able to capture which of the records have been selected by checking their resp checkboxes.

Solutions that I have tried: I have tried capturing the same at user command by checking the value in slis_selfield. But all the records show the value as 1 for the checkbox field.

Kinldy suggest how to go about it.

I am not using Object Oriented ALV. Please suggest something to be used in ALV Grid display in 4.6C version.

Regards,

Namrata