paginator position

hi,
this is my code
           $this->dtgForm = new QDataGrid($this);
           $this->dtgForm->CellPadding = 5;
           $this->dtgForm->CellSpacing = 0;

           $this->dtgForm->UseAjax = true;

           $this->dtgForm->Paginator = new QPaginator($this);
           $this->dtgForm->ItemsPerPage = 20;

i wonder why the paginator will auto render on top of the datagrid because i set the form as the parent of the paginator. I want to put the paginator on the bottom of my datagrid. How to do that?