How To enable ZOOM button In Oracle Apps : Part2

To know block and item name:

Open CUSTOM.pll body using form builder.

Replace the above code with below code.

Code to Copy:

  form_name VARCHAR2(30):=NAME_IN('system.current_form');
  block_name VARCHAR2(30):=NAME_IN('system.current_block');
  item_name VARCHAR2(30):=NAME_IN('system.current_item');

BEGIN
   IF (    form_name = 'POXPOEPO'
       AND block_name = 'PO_LINES'
       AND item_name = 'MARKET_PRICE')
   THEN
      RETURN TRUE;
   ELSE
      RETURN FALSE;
   END IF;

Copy the CUSTOM.pll to resources path and compile.

Open the Purchase Orders form and move to Price reference tab -->

Market price to see the zoom button.

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Also read: How to Compile CUSTOM.pll