title: How to Clicking "X" in Form, will not close it but hide it
body: <p>how can i make my Form not to close but to Hide when user click on the "X" button on the form? </p>
  
  <p>As i have a NotifyIcon that contain an Exit menu which actually does the Form Closing (i don't want the Form's "X" to close the form but to hide it).</p>
  
  <p>thanks.</p>