header and item details on same screen in form of two reports

Hello,

I would like to print in a same screen two ALV grid with different command for each.

The two grid will be linked.

One is the header of the datas and the second represent the items of the selected data in the the header grid.

example user will get all sales order details and when user click on any sales order than on the same screen below i get the item data of that sales order...

how can i do that

Do you have any example for me, please ?

Thanks in advance for help,

Best regards,

Taran