Forum Post: Confirm dialog problem before closing a form with 'X'

Hi all, I create a non-block form by axlFormCreate(). I expect that when user click 'x' (right-top side of a form), a window popup and ask if need to save something. But with my form action function like below, the axlUIYesNo window does not appear and i have no idea why. procedure( MyFormAct(r_form) case(r_form->doneState (3 println("user press X to exit...") confirm = axlUIYesNo("Do you want to save before exit?" "Test") println(confirm) ) (0 println("Do something.")) ) ) command print: "user press X to exit..." nil BTW, SPB version is 17.2-2016 S034