POP UP MESSAGE

AFAIK creating pop-up messages are not possible. Have you tried showing a confirmation screen?

Try this:

• Create a new interface to show a confirmation page that the task was submitted and the details have been saved using rich-text
• Use this form in a user input task in the process after the database write is successful.
• Chain this UIT with your main form so that the confirmation screen is shown to the end-user as soon as the form submission is successful

If you click the button while submitting the form, you can show popup. You can configure this in button's confirmation message.

Once you submitted the form, all the values will be written in db which can be configured in process model.