Context View in child tables

I want the save button to change its caption, depending on whether it is in the Products or Items Form.
I use the following expression:
CONTEXT (“View”) = “Orders_Form”, “Send Order”,
CONTEXT (“View”) = “Items_Form”, “Add”
It works correctly if I go to each table and enter the Form, but since the Items table is part of the Orders table, when I enter Orders and touch New to enter an item, the caption does not change.
I also notice that in the editor preview, the name of the Form does not change either.
Is there a way to achieve it?