instruction to block the output at the same point

Hello Gurus

I am changing an old abap report , it uses an old write instruction....

In this report after the selection and having executed the report (F8)i see a vertical

list of many Sales Order and many pages like output...

When i click on sales order and i click on button(Update status Revoke) on the report , it executes the instruction

AT USER-COMMAND.

CASE SY-UCOMM.

And so on the other instructions....

but graphically the output list comes back to first page.

I need an instruction to block the list at the order that i have selected or that blocks the list at the same page.

can you help me?

Thanks in advance