Destroy the Form in the pop up window after setSaveOnEnter(true);

I have a add button in my ToolsStrip. When clicked on add button there pop s up a dynamic form window, after fetching the data and enter is clicked the data in my form gets saved (data is seen in the background grid). But the Dynamic Form in the pop up window does not gets destroyed.

Is there any handler/any way to destroy the window once data is being saved by clicking enter ?

Thanks in advance.