Windows form exit

If it has, the user is asked whether to save the changes to a file. The Closing event is obsolete starting with the. NET Framework 2. The Closing event occurs as the form is being closed. When a form is closed, all resources created within the object are released and the form is disposed. If you cancel this event, the form remains opened.

To cancel the closure of a form, set the Cancel property of the CancelEventArgs passed to your event handler to true. When a form is displayed as a modal dialog box, clicking the Close button the button with an X at the upper-right corner of the form causes the form to be hidden and the DialogResult property to be set to DialogResult.

You can override the value assigned to the DialogResult property when the user clicks the Close button by setting the DialogResult property in an event handler for the Closing event of the form. When the Close method is called on a Form displayed as a modeless window, you cannot call the Show method to make the form visible, because the form's resources have already been released. To hide a form and then make it visible, use the Control.

Hide method. The Form. EsbenSkovPedersen but there might be internal caches that the OS doesn't know about in the app, in the. Net framework, in third-party libraries, etc. Giorgi That depends very much on how the thread s are designed, and it's a question on its own. Usually the best way ist to provide some mechanism to "tell" the thread to finish its work. Then you could Thread. Join it, to wait until it's really finished and call Application.

Exit afterwards. You also could call Thread. Abort but this is usually not a good option and should be used with caution. Search for questions like stackoverflow. Timer Sub End, Nothing, , Timeout. Infinite Application. Exit This method is perfect, allowing the software to close gently with application. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Stack Gives Back Safety in numbers: crowdsourcing data on nefarious IP addresses.

Featured on Meta. New post summary designs on greatest hits now, everywhere else eventually. Linked 0. See more linked questions. Related If the user clicks Yes , the application calls Exit , to process all remaining messages in the queue and then to quit. The example requires that listBox1 and button1 have been instantiated and placed on a form.

The Exit method stops all running message loops on all threads and closes all windows of the application. This method does not necessarily force the application to exit. The Exit method is typically called from within a message loop, and forces Run to return.

To exit a message loop for the current thread only, call ExitThread. Exit raises the following events and performs the associated conditional actions:. A FormClosing event is raised for every form represented by the OpenForms property. This event can be canceled by setting the Cancel property of their FormClosingEventArgs parameter to true.

If one of more of the handlers cancels the event, then Exit returns without further action. Otherwise, a FormClosed event is raised for every open form, then all running message loops and forms are closed.

The Exit method does not raise the Closed and Closing events, which are obsolete as of.