This event is fired when the user clicks on the close button of a Tab on a Tab-Control with the Close-Buttons style. The EVENT-DATA-1 data item contains the index of the Tab. The runtime automatically removes the Tab. The content of the Tab page is removed automatically only if either the Accordion style or the Allow-Container style is set, otherwise it’s the program's duty to remove the page content.

Setting EVENT-ACTION to EVENT-ACTION-FAIL prevents the Tab from being removed.