InfoPath Dev

Is there a way to programmatically close Infopath application when user clicks "Submit".  

Clicking submit: The existing form closes and prompts user with a choice to open new form. If user clicks "No" - the Infopath application remains open. 

How would I quit the application programmatically without setting form security level to "Full trust"? 

Thanks in advance

 Why does it need to be programatically?

If your button is a submit-type button, you can set the SUbmit Options to close after submit - screenshot attached.

If your button is not a submit-type button, simply add an action that closes the form. Easy! :)