Scenario:

Add a Button(GetItems) to SO and PO when we click that button(GetItems) it has to show all the item details of that selected SO and PO orders

Solution:

First create Getitems Form

Add salesline and PurchLine to the datasources

Then create a two grids POItems and SOItems and set autodeclaration as yes in properties of that grids

Drag and drop Itemid from Salesline and purchline to both the grids

Then write init method as follows

public void init()

{

    super();

    if (element.Args().caller().name()==formStr(PurchTableListPage))

    {

        POItems.visible(true);

        SOItems.visible(false);

    }

    else

        if(element.Args().caller().name()==formStr(SalesTableListPage))

    {

        SOItems.visible(true);

        POItems.visible(false);

    }

}

Create MenuItem for Above GetItems

Now goto SalestableListpage, create button and add menuitem(GetItems)to that button