Forum Post: set CommandButton to know which grid to manipulate

Hi, I have an AX 2012 form with an actionpaneTab containing one CommandButton:NewButton and one CommandButton:DeleteButton, but there are two grid in my form. Each grid has own datasource and has own tabpage. My question is how can I tell to my two buttons which grid to manipulate ? For now the two buttons only controls the first grid. So without creating for each grid an actionpaneTab : how can i insert or delete a line in the second grid by pressing NewButton or DeleteButton ? Thanks.