How to Disable Alt + F4 closing form?

by

This does the job:

private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
    e.Cancel = true;
}

Edit: In response to pix0rs concern – yes you are correct that you will not be able to programatically close the app. However, you can simply remove the event handler for the form_closing event before closing the form:

this.FormClosing -= new System.Windows.Forms.FormClosingEventHandler(this.Form1_FormClosing);
this.Close();

More Related Contents:

  1. How do I make a textbox that only accepts numbers?
  2. How to inject Javascript in WebBrowser control?
  3. Controlling Volume Mixer
  4. Can’t view designer when coding a form in C#
  5. Resize image proportionally with MaxHeight and MaxWidth constraints
  6. Complex UI inside ListBoxItem
  7. How can I get the PID of the parent process of my application
  8. How to make multi-language app in Winforms?
  9. OLEDB Parameterized Query
  10. Trying to use the C# SpellCheck class
  11. How to invoke a UI method from another thread
  12. Visual Studio build fails: unable to copy exe-file from obj\debug to bin\debug
  13. Windows Forms Graphic Issue on Windows 10 OS
  14. how to delay shutdown and run a process in window service
  15. Hide form instead of closing when close button clicked
  16. C# ListView Column Width Auto
  17. Is it possible to Embed Gecko or Webkit in a Windows Form just like a WebView?
  18. Key Events: ProcessCmdKey
  19. How to know if a line intersects a rectangle
  20. Parent Control Mouse Enter/Leave Events With Child Controls
  21. How to simulate Windows shutdown for debugging?
  22. ContextMenuStrip.Owner Property null When Retrieving From Nested ToolStripMenuItem
  23. How to create a form with a border, but no title bar? (like volume control on Windows 7)
  24. How to refresh datagridview when closing child form?
  25. DataGridView Image for Button Column
  26. Change ComboBox Border Color in Windows Forms
  27. How to set text to a control from resource file in design time?
  28. Passing a variable between Windows Forms forms
  29. What does “Beta: Use Unicode UTF-8 for worldwide language support” actually do?
  30. How to set a text box for inputing password in winforms?

Leave a Comment