OnSubmitButtonClicked
The Submit button appears at the top right of all Top Pages—if the Auto-Add Submit Button property of the top page has been left at its default value of true in the Page Properties settings.
The default behavior of the Submit button depends on the position of the page in the page sequence.
•If the page is the last page in the page sequence, tapping/clicking the Submit button exits the workflow.
•If the page is not the last page, then the workflow goes to the next page.
If you wish to specify any other action when the Submit button of a page is tapped/clicked, then add the appropriate actions to the OnSubmitButtonClicked event of the page.