How to catch Alt+F4?

....next question....

hi all,

-- in my MainForm method i am creating a dialog.
-- if the user clicks OK (in this dialog), everything´s fine...the application goes on
-- if the user clicks the Cancel button ==> i call Application.Exit() and anything will be closed - fine!
-- but if the user presses Alt+F4, the dialog closes but the application will start....

==> what i want:
if the user clicks Alt+F4, the same must happen as clicking the Cancel button

>>>>
so
a) how to catch an key event (must i add a key handler to the dialog form if yes, HOW)?
b) how can i catch the X (the icon in the very right edge up) event?


thanx a lot,
andi

WEll to catch the X in the corner you have to override the OnClosing Event

Here's some that I use:

Code:

---

                protected override void OnClosing(CancelEventArgs e)
                {
                        log.Debug(String.Format("Onclosing called, this.sessionEnding = {0}",this.sessionEnding));
                        if (this.sessionEnding)
                        {
                                //Windows IS shutting down
                                e.Cancel = false;
                                this.ShutDown();
                        }
                        else  //windows isn't closing
                        {
                                //Method overridden so we can minimize the app instead of closing it
                                e.Cancel = true;
                                //let's minimize the form, and hide it
                                this.WindowState = FormWindowState.Minimized;
                                Hide();
                        }
                }

---

Basically, as long as the compute risn't shutting down (sessionEnding) it just hides the form.

And for Alt-F4 you will have to write a OnKeyDown Event handler and attachit to whatever might had focus when the user presses alt-f4

Code:

---

                private void ConversationDisplayBox_KeyDown(object sender,  System.Windows.Forms.KeyEventArgs kea)
                {
                        if (kea.Alt & (kea.Code == *whatever F4 equals*))
                        {
                                                       
                        }
                }

---

hi,

thank your for your answer!
it works fine.

meanwhile i found an answer for my other key event question:

this.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.OnKeyPressEvent);
...
...
...
...
...
private void OnKeyPressEvent(object sender, System.Windows.Forms.KeyPressEventArgs e)
{
//.........
}


thanx a lot,
andi