Messages in C # that shield forms are closed

Often can see such a program, point to close the button after the program did not close, but minimized to the system tray, like NetEase bubble, MSN and other programs. Implementing this is simple enough to capture the message when the form is closed. The code is as follows:

protected override void WndProc (ref message m) {const int wm_syscommand = 0x0112; Const int sc_close = 0xf060; if (m.msg 　　　　= = Wm_syscommand && (int) M.wparam = = Sc_close) {MessageBox.Show ("The user point has been turned off button"); 　　Return Base. WndProc (ref m); }

This passage is placed in the form's code to